Timothy Duncan, MD
NPI 1013908227 · Emergency Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Duncan, MD is a Emergency Medicine Physician provider in San Francisco, CA (NPI 1013908227).
Provider details
- NPI number
- 1013908227
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- License
- G87083 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
884 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 341 | $9 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 284 | $193 |
| Critical Care, First 30-74 Minutes99291 | 172 | $242 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 87 | $134 |
Typical Medicare-allowed amounts for these services range $9–$242 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 44 | 43 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 30 | 29 |
| Ondansetronbrand: Ondansetron Odt | 18 | 18 |
| Ibuprofen | 15 | 15 |
| Pantoprazole Sodium | 14 | 14 |
| Prednisone | 14 | 12 |
| Doxycycline Hyclate | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-04
- Last updated
- 2007-07-08
Frequently asked questions
- What is Timothy Duncan's NPI number?
- Timothy Duncan's National Provider Identifier (NPI) is 1013908227, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Duncan's specialty?
- Timothy Duncan is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Duncan located?
- Timothy Duncan's practice location on file with NPPES is 2333 Buchanan St, San Francisco, CA 94115-1925.
- What is Timothy Duncan's phone number?
- The practice phone number listed in the NPPES registry for Timothy Duncan is (209) 342-2300.
- Does Timothy Duncan accept Medicare?
- Timothy Duncan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Duncan's NPI active?
- Yes — Timothy Duncan's NPI (1013908227) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.