Margaret Hay, MD
Margaret Hay, MD is a Pulmonary Disease Physician in Denver, CO, registered under NPI 1003347683. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Denver, based on OpenStreetMap data collected Aug 31, 2026. Parking is available about 0.33 mi away. The nearest transit stop is 992 ft away, served by E 22nd Ave & Franklin St. A pharmacy sits 0.35 mi from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.22 mi away.
Getting here and what is nearby
Parking K Parking Garage 337 ft ~2 min
1830 Franklin Street, Denver 80218
Coffee Randy’s 434 ft ~2 min
2045 Franklin Street, Denver 80205
Transit E 18th Ave & Franklin St 712 ft ~3 min
Coffee Starbucks 734 ft ~3 min
1600 East 18th Avenue, Denver 80218
Restaurant Einstein Bros. Bagels 739 ft ~3 min
Restaurant Kenji Sushi 828 ft ~4 min
Restaurant Onefold 850 ft ~4 min
1420 East 18th Avenue, Denver 80218
Mo-Su 07:00-15:00
Pharmacy Intermountain Pharmacy - Saint Joseph Hospital 943 ft ~4 min
1375 East 19th Avenue, 80218
Mo-Fr 08:00-20:00; Sa-Su 09:00-17:00
Transit E 18th Ave & High St 980 ft ~4 min
Transit E 22nd Ave & Franklin St 992 ft ~4 min
Convenience 7-Eleven 0.21 mi ~5 min
Coffee Sesame Sandwiches 0.22 mi ~5 min
1432 East 22nd Avenue, Denver 80205
Sa-Tu 10:30-15:30; We-Fr 10:30-20:00
Gas station 7-Eleven 0.23 mi ~5 min
Pharmacy Saint Joseph Clinic Pharmacy 0.28 mi ~6 min
1825 Marion Street, Denver 80218
Convenience 7-Eleven 0.30 mi ~6 min
Parking SCL Health Saint Joseph Hospital Parking 0.33 mi ~7 min
1990 Downing Street, Denver 80218
Parking 0.33 mi ~7 min
1010 East 19th Avenue, Denver 80218
Pharmacy Walgreens 0.35 mi ~8 min
1960 Ogden Street, Denver 80218
Convenience Lincoln Market 0.44 mi ~9 min
1704 East 25th Avenue, Denver 80205
Mo-Sa 08:00-19:00; Su 09:00-18:00
Gas station Sinclair 0.47 mi ~10 min
Gas station Conoco 0.48 mi ~10 min
1770 East Colfax Avenue, Denver 80218
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 |
|---|---|---|
| 71056 | CO | Pulmonary Disease Physician primary |
| 71056 | CO | Internal Medicine Physician |
This provider holds licence 71056 issued in CO. 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
- Practitioner - Pulmonary Disease
- PAC ID
- 9830460526
- Enrollment ID
- I20230831001980
Medicare enrolment is recorded as approved under the provider type Practitioner - Pulmonary Disease. 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
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207RP1001X | Pulmonary Disease Physician Pulmonary Disease | 71056 | CO | primary |
| 207R00000X | Internal Medicine Physician | 71056 | CO |
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 | 1003347683 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 24, 2017 |
| Last updated | Aug 30, 2023 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | MD |
| Practice address |
1601 E 19TH AVE STE 3100 Denver, CO 80218 (303) 863-0300 Fax (303) 863-7014 |
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 | 3 | 4 | 7 | 6 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 4 | 5 | 6 | 7 |
Sum = 57 · next multiple of 10 = 60 · check digit = 3 · actual last digit = 3
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.