Does J44.89 map to an HCC in V28?

Yes. The live J44.89 card shows Maps to CMS-HCC V28 HCC 280, and the PY2026 CSV row is J4489,280.0,,age >= 18,. J44.89 is Other specified COPD and is the asthma-COPD overlap coding path when documentation supports it. Code Also type of asthma if applicable (J45.-).

Does plain asthma J45.909 map under V28?

No. The live J45.909 card shows verified no payable CMS-HCC V28 mapping, and there is no J45909 row in the PY2026 V28 CSV. Billable does not mean risk-adjusted. Moderate persistent J45.40 is the same no-map pattern.

Which asthma codes map to HCC 279?

Severe persistent asthma only in this desk: J45.50 (uncomplicated), J45.51 (with acute exacerbation), and J45.52 (with status asthmaticus). CSV examples: J4550,279.0,,, ; J4551,279.0,,, ; J4552,279.0,,,. The HCC 279 hub shows a source-labeled reference coefficient of 0.818 (not a member total).

What does Code Also mean on J44.89 for asthma?

Official Code Also on the J44 family says type of asthma, if applicable (J45.-). When the chart supports asthma with COPD / overlap, assign J44.89 for the COPD / overlap side and Code Also the documented asthma type under J45.-. Do not invent either half from unsupported documentation.

Do other J44 COPD codes also map to HCC 280?

Yes for the leaves in this desk: J44.0, J44.1, J44.81, and J44.9 all map to V28 HCC 280 with CSV rows carrying age >= 18. Always confirm the exact leaf on the live card and CSV.

What is the HCC 280 reference coefficient?

The live HCC 280 hub shows a source-labeled community non-dual aged reference coefficient of 0.319 across about 79 ICD mapping rows. That is a category reference, not a member RAF total. Segment coefficients vary.

How is this different from the T80.211 / R78.81 sequencing desk?

This desk walks asthma-COPD overlap (J44.89 -> HCC 280), plain asthma no-maps (J45.909 / J45.40), and severe persistent asthma (HCC 279). The T80.211 / R78.81 desk walks CVC bloodstream infection, bacteremia, and sepsis (HCC 2). Cross-link; do not rewrite either into the other.

J44.89 Is Asthma-COPD Overlap (HCC 280). Plain

J44.89 (other specified COPD / asthma-COPD overlap path) maps to CMS-HCC V28 HCC 280 (CSV J4489,280.0,,age >= 18,; hub coeff ref 0.319). Plain asthma J45.909 and moderate J45.40 have verified no payable V28 mapping. Severe persistent J45.50/51/52 map HCC 279. Code Also asthma (J45.-) when documented.

If you searched asthma-COPD overlap, J44.89, HCC 280, or COPD HCC next to V28, you are looking at a mapping cluster that confuses plain asthma with COPD and asthma-COPD overlap under CMS-HCC V28 for payment year 2026.

J44.89 (Other specified chronic obstructive pulmonary disease) is billable. On the live FY2026 card it maps to CMS-HCC V28 HCC 280, and the PY2026 V28 CSV row is `J4489,280.0,,age >= 18,`. Official Includes language on the J44 family covers asthma with chronic obstructive pulmonary disease, chronic asthmatic (obstructive) bronchitis, and chronic obstructive asthma. Official Code Also says: type of asthma, if applicable (J45.-). That is the asthma-COPD overlap coding path when documentation supports both.

Plain asthma alone is different. J45.909 (Unspecified asthma, uncomplicated) is billable with verified no payable CMS-HCC V28 mapping and no `J45909` CSV row. Moderate persistent J45.40 is the same pattern (no payable V28 map, no `J4540` row). Severe persistent asthma is the asthma exception that pays: J45.50, J45.51, and J45.52 map to V28 HCC 279 (CSV `J4550,279.0,,,` and siblings).

Related COPD leaves J44.9, J44.0, J44.1, and J44.81 also map to HCC 280 with the same `age >= 18` edit. The HCC 280 hub shows a source-labeled community non-dual aged reference coefficient of 0.319 across about 79 ICD rows. That is a category reference, not a member total.

This page is the coder walk for that map cluster. For the broader COPD HCC guide, see COPD pulmonary disease HCC coding guide. Keep sequencing and other desk posts separate, such as the T80.211 / R78.81 sequencing desk.

Desk table: verified maps and no-maps (2026-09-28)

Code	Official short	V28 result	Coeff ref	CSV (no decimal)
J44.89	Other specified COPD (incl. asthma-COPD overlap path)	HCC 280	0.319	`J4489,280.0,,age >= 18,`
J44.9	COPD, unspecified	HCC 280	0.319	`J449,280.0,,age >= 18,`
J44.0	COPD with acute lower respiratory infection	HCC 280	0.319	`J440,280.0,,age >= 18,`
J44.1	COPD with acute exacerbation	HCC 280	0.319	`J441,280.0,,age >= 18,`
J44.81	Bronchiolitis obliterans / BOS	HCC 280	0.319	`J4481,280.0,,age >= 18,`
J45.909	Unspecified asthma, uncomplicated	none	n/a	no `J45909` row
J45.40	Moderate persistent asthma, uncomplicated	none	n/a	no `J4540` row
J45.50	Severe persistent asthma, uncomplicated	HCC 279	0.818	`J4550,279.0,,,`
J45.51	Severe persistent asthma with acute exacerbation	HCC 279	0.818	`J4551,279.0,,,`
J45.52	Severe persistent asthma with status asthmaticus	HCC 279	0.818	`J4552,279.0,,,`

Coefficients are source-labeled reference values from the live HCC 280 and HCC 279 hubs (community non-dual aged references 0.319 and 0.818). Not member totals. Segment coefficients vary; look up the hub and calculator for the enrollment segment you need. Note the age >= 18 edit on the cited J44* HCC 280 CSV rows.

What J44.89 is (and is not)

J44.89 is Other specified chronic obstructive pulmonary disease. It is billable. Under PY2026 community V28 it maps to HCC 280. CSV: `J4489,280.0,,age >= 18,`.

Live Includes (inherited from J44) cover asthma with COPD, chronic asthmatic (obstructive) bronchitis, and chronic obstructive asthma. Live Code Also: type of asthma, if applicable (J45.-). When the chart supports asthma-COPD overlap, expect J44.89 for the COPD / overlap side and Code Also the documented asthma type under J45.-.

Do not invent a different payment HCC for J44.89. Do not treat J44.89 as plain asthma alone. Do not drop the age edit note: the PY2026 CSV carries `age >= 18` on this row.

What plain asthma does under V28

J45.909 is Unspecified asthma, uncomplicated. Billable. Live card: Verified no payable CMS-HCC V28 mapping. No `J45909` CSV row.

J45.40 (Moderate persistent asthma, uncomplicated) is the same V28 result: billable, no payable map, no `J4540` row.

Asthma alone generally does not pay under V28 except severe persistent asthma (HCC 279). Billable does not mean risk-adjusted.

When severe persistent asthma maps to HCC 279

If the provider documents severe persistent asthma, uncomplicated, use J45.50. That maps to V28 HCC 279 (CSV `J4550,279.0,,,`). Source-labeled reference coefficient 0.818 on the HCC 279 hub (3 ICD rows in that category for this desk's CSV slice).

If the provider documents severe persistent asthma with (acute) exacerbation, use J45.51 -> HCC 279 (`J4551,279.0,,,`).

If the provider documents severe persistent asthma with status asthmaticus, use J45.52 -> HCC 279 (`J4552,279.0,,,`).

Do not invent HCC 279 from unspecified or moderate persistent asthma. Confirm severity and encounter language on the live card before you claim the map.

Coding paths (documentation-driven)

Pick the path from what the chart actually supports. Do not invent COPD or severe persistent asthma for RAF.

1. Chart supports asthma-COPD overlap / other specified COPD that fits J44.89 -> expect J44.89 -> V28 HCC 280 (age >= 18 edit). Code Also the asthma type under J45.- when applicable.

2. Chart supports COPD, unspecified -> J44.9 -> HCC 280 (same age edit).

3. Chart supports COPD with acute lower respiratory infection -> J44.0 -> HCC 280.

4. Chart supports COPD with acute exacerbation -> J44.1 -> HCC 280.

5. Chart supports bronchiolitis obliterans / BOS under J44.81 -> J44.81 -> HCC 280.

6. Chart supports unspecified asthma, uncomplicated only (no COPD / overlap) -> J45.909. Billable. No V28 payment map.

7. Chart supports moderate persistent asthma, uncomplicated only -> J45.40. Billable. No V28 payment map.

8. Chart supports severe persistent asthma (uncomplicated / exacerbation / status) -> matching J45.50 / J45.51 / J45.52 -> V28 HCC 279.

9. Chart supports both COPD / overlap and a specific asthma type -> follow J44.* plus Code Also J45.- as documentation supports. Do not invent the COPD half from asthma alone.

10. Do not treat J45.909 as a synonym for J44.89. Different codes, different V28 results.

MEAT for mapped HCC 280 / HCC 279

A mapped J44.* (HCC 280) or J45.5* (HCC 279) code still needs monitoring, evaluation, assessment, or treatment in the eligible encounter year. A problem-list row that says "COPD" or "asthma" from a prior year does not carry the HCC forward by itself.

For mapped respiratory HCCs in this desk, the note should support:

M Monitor: symptoms, exacerbations, O2 sat when used, peak flow / spirometry when documented, inhaler adherence

E Evaluate: exacerbation vs baseline, infection when present, overlap vs asthma-only differential, imaging / PFTs when used

A Assess: explicit COPD, asthma-COPD overlap, or severe persistent asthma in the assessment (not only "shortness of breath" or "wheezing" when a more specific diagnosis is supported)

T Treat: inhalers, systemic steroids when documented, oxygen, pulmonary rehab referral, smoking cessation when addressed, follow-up

MEAT is a review mnemonic, not a universal CMS coding rule. Follow the applicable coding, encounter, program, and payer requirements. See MEAT and problem lists.

Audit and query traps

1. Coding plain asthma (J45.909 / J45.40) and expecting HCC 280. Those leaves have verified no payable V28 mapping.

2. Skipping J44.89 when documentation supports asthma-COPD overlap / other specified COPD, then losing HCC 280.

3. Ignoring Code Also on J44 for type of asthma (J45.-) when asthma type is documented with overlap.

4. Inventing HCC 279 from unspecified or moderate persistent asthma. Only severe persistent J45.50 / J45.51 / J45.52 map in this desk.

5. Dropping the age >= 18 edit note on J44* HCC 280 CSV rows.

6. Using the HCC 280 reference coefficient 0.319 or HCC 279 0.818 as a member RAF total. Category references only.

7. Treating billable as risk-adjusted. J45.909 proves the opposite under V28.

8. Folding other desk topics into this post. Keep this page on the asthma-COPD / HCC 280 walk and cross-link companions such as the T80.211 / R78.81 sequencing desk.

9. Inventing Coding Clinic quotes, competitor CTAs, or PHI examples.

10. Assuming every J45 asthma code pays. Under V28, asthma alone generally does not, except severe persistent (279).

11. Coding a historical "COPD" label with no current MEAT in the eligible year.

12. Confusing HCC 280 (COPD / ILD family on the hub) with HCC 279 (severe persistent asthma). Different categories, different coeffs, different ICD sets. When both categories are present, live HCC 279 supersedes HCC 280 for payment.