Natalie Tammen, PA-C
NPI 1477058584 · Physician Assistant · Oakland, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Natalie Tammen, PA-C is a Physician Assistant provider in Oakland, CA (NPI 1477058584).
Provider details
- NPI number
- 1477058584
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- 55479 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 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
85 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 31 | $130 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 22 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 19 | $93 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 13 | $133 |
Typical Medicare-allowed amounts for these services range $9–$133 (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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 29 | 12 |
| Atorvastatin Calcium | 21 | — |
| Trazodone Hcl | 19 | — |
| Lorazepam | 17 | — |
| Alendronate Sodium | 14 | — |
| Amlodipine Besylate | 14 | — |
| Rosuvastatin Calcium | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-03-29
- Last updated
- 2021-09-28
- Certified
- 2021-09-28
Frequently asked questions
- What is Natalie Tammen's NPI number?
- Natalie Tammen's National Provider Identifier (NPI) is 1477058584, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Natalie Tammen's specialty?
- Natalie Tammen is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Natalie Tammen located?
- Natalie Tammen's practice location on file with NPPES is 3850 Grand Ave, Oakland, CA 94610-1004.
- What is Natalie Tammen's phone number?
- The practice phone number listed in the NPPES registry for Natalie Tammen is (510) 225-1013.
- Does Natalie Tammen accept Medicare?
- Natalie Tammen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Natalie Tammen's NPI active?
- Yes — Natalie Tammen's NPI (1477058584) is active in the NPPES registry as of the last update on 2021-09-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.