Mariel Ma, MD
Mariel Ma, MD is a Pulmonary Disease Physician in Madison, WI, registered under NPI 1003519059. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Madison, based on OpenStreetMap data collected Aug 28, 2026. Parking is available about 0.32 mi away. There is EV charging 0.29 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 729 ft away, served by Highland & Waisman (NB). A pharmacy sits 153 ft from the entrance (University Hospital Outpatient Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.35 mi away.
Getting here and what is nearby
Pharmacy University Hospital Outpatient Pharmacy 153 ft ~1 min
EV charging 415 ft ~2 min
EV charging 429 ft ~2 min
Parking 536 ft ~3 min
Transit University Bay & Highland (NB) 574 ft ~3 min
Transit Highland & University Bay (SB) 604 ft ~3 min
Transit Highland & Waisman (NB) 729 ft ~3 min
Coffee EVP Coffee University Bay 895 ft ~4 min
Restaurant Einstein Bros. Bagels 0.25 mi ~5 min
2701 University Avenue, Madison 53705
Mo-Fr 05:30-15:00; Sa,Su 06:00-15:00
Restaurant Wings Over 0.26 mi ~6 min
Restaurant Qdoba 0.26 mi ~6 min
2741 University Avenue, Madison 53705
Mo-Su 10:30-22:00
Gas station Spirit 0.28 mi ~6 min
EV charging 0.29 mi ~6 min
Convenience Spirit Mart 0.29 mi ~6 min
2801 University Avenue
Parking 0.32 mi ~7 min
2535 University Avenue, Madison 53705
Parking 0.32 mi ~7 min
2500 University Avenue, Madison 53705
Coffee Barriques - University 0.35 mi ~7 min
Hotel InnTowner 0.35 mi ~8 min
Convenience 7-Eleven 0.44 mi ~9 min
Gas station BP 0.44 mi ~9 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 87194-20 | WI | Pulmonary Disease Physician primary |
This provider holds licence 87194-20 issued in WI. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Order And Referring Only - Internal Medicine
- PAC ID
- 5395103279
- Enrollment ID
- I20230626000726
Medicare enrolment is recorded as approved under the provider type Order And Referring Only - Internal Medicine. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Pulmonary Disease covers
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs. NUCC Health Care Provider Taxonomy, code 207RP1001X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003519059 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 27, 2023 |
| Last updated | Jun 6, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | MD |
| Practice address |
600 HIGHLAND AVE Madison, WI 53792 (608) 263-6400 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 5 | 1 | 9 | 0 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 1 | 9 | 0 | 1 |
Sum = 41 · next multiple of 10 = 50 · check digit = 9 · actual last digit = 9
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.