Rhonda Lambert, MD
NPI 1942230230 · Rheumatology Physician · San Mateo, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rhonda Lambert, MD is a Rheumatology Physician provider in San Mateo, CA (NPI 1942230230).
Provider details
- NPI number
- 1942230230
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A41349 (CA)
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 tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
108 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 60 | $212 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 27 | $18 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 21 | $172 |
Typical Medicare-allowed amounts for these services range $18–$212 (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 |
|---|---|---|
| Prednisone | 86 | 35 |
| Hydroxychloroquine Sulfate | 75 | 33 |
| Methotrexate Sodiumbrand: Methotrexate | 62 | 31 |
| Celecoxib | 55 | 17 |
| Meloxicam | 41 | 20 |
| Leflunomide | 33 | 16 |
| Gabapentin | 26 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$136,664 across 205 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1900 Ofarrell St Ste 190San Mateo, CA 94403-1372Phone: (650) 306-9490Fax: (650) 306-0250
Registry dates
- Enumerated
- 2006-07-03
- Last updated
- 2024-04-25
- Certified
- 2024-04-25
Frequently asked questions
- What is Rhonda Lambert's NPI number?
- Rhonda Lambert's National Provider Identifier (NPI) is 1942230230, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rhonda Lambert's specialty?
- Rhonda Lambert is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Rhonda Lambert located?
- Rhonda Lambert's practice location on file with NPPES is 101 S San Mateo Dr Ste 307, San Mateo, CA 94401-3844.
- What is Rhonda Lambert's phone number?
- The practice phone number listed in the NPPES registry for Rhonda Lambert is (650) 348-6011.
- Does Rhonda Lambert accept Medicare?
- Rhonda Lambert is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rhonda Lambert's NPI active?
- Yes — Rhonda Lambert's NPI (1942230230) is active in the NPPES registry as of the last update on 2024-04-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.