Stephanie Greger, M.D.
NPI 1912138132 · Rheumatology Physician · Ventura, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephanie Greger, M.D. is a Rheumatology Physician provider in Ventura, CA (NPI 1912138132).
Provider details
- NPI number
- 1912138132
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 245362 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
129 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 | 70 | $100 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 45 | $148 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 14 | $68 |
Typical Medicare-allowed amounts for these services range $68–$148 (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 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 161 | 39 |
| Prednisone | 123 | 36 |
| Etanerceptbrand: Enbrel Sureclick | 93 | 11 |
| Leflunomide | 92 | 20 |
| Hydroxychloroquine Sulfate | 54 | 19 |
| Etanerceptbrand: Enbrel | 52 | — |
| Diclofenac Sodium |
Practice location
Mailing address
Additional practice locations (3)
- 845 N 10th St Ste 3Santa Paula, CA 93060-1348Phone: (805) 525-0215
- 200 S Wells Rd Ste 100Ventura, CA 93004-1378Phone: (805) 647-6322Fax: (805) 647-1764
- 300 Hillmont Ave Ste 502Ventura, CA 93003-1651Phone: (805) 652-6222
Registry dates
- Enumerated
- 2009-08-05
- Last updated
- 2026-05-28
- Certified
- 2026-05-28
Frequently asked questions
- What is Stephanie Greger's NPI number?
- Stephanie Greger's National Provider Identifier (NPI) is 1912138132, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephanie Greger's specialty?
- Stephanie Greger is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephanie Greger located?
- Stephanie Greger's practice location on file with NPPES is 3291 Loma Vista Rd Bldg 340, Ventura, CA 93003-3099.
- What is Stephanie Greger's phone number?
- The practice phone number listed in the NPPES registry for Stephanie Greger is (805) 652-6222.
- Does Stephanie Greger accept Medicare?
- Stephanie Greger is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephanie Greger's NPI active?
- Yes — Stephanie Greger's NPI (1912138132) is active in the NPPES registry as of the last update on 2026-05-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.