Nathan Teismann, M.D.
NPI 1548459282 · Emergency Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathan Teismann, M.D. is a Emergency Medicine Physician provider in San Francisco, CA (NPI 1548459282).
Provider details
- NPI number
- 1548459282
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A95888 (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
18 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
589 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 224 | $186 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 143 | $9 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 127 | $130 |
| Critical Care, First 30-74 Minutes99291 | 54 | $227 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 28 | $75 |
| Electrocardiogram (ecg) 1 to 3 Leads With Review By Physician Only93042 | 13 | $7 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 59 | 59 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 52 | 52 |
| Doxycycline Hyclate | 23 | 23 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 16 | 16 |
| Prednisone | 13 | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-10-18
- Last updated
- 2011-01-13
Frequently asked questions
- What is Nathan Teismann's NPI number?
- Nathan Teismann's National Provider Identifier (NPI) is 1548459282, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Teismann's specialty?
- Nathan Teismann is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nathan Teismann located?
- Nathan Teismann's practice location on file with NPPES is 505 Parnassus Ave, San Francisco, CA 94143-0208.
- What is Nathan Teismann's phone number?
- The practice phone number listed in the NPPES registry for Nathan Teismann is (415) 609-8195.
- Does Nathan Teismann accept Medicare?
- Nathan Teismann is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathan Teismann's NPI active?
- Yes — Nathan Teismann's NPI (1548459282) is active in the NPPES registry as of the last update on 2011-01-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.