Richard Williams, M.D.
NPI 1467457390 · Specialist · San Dimas, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Richard Williams, M.D. is a Specialist provider in San Dimas, CA (NPI 1467457390).
Provider details
- NPI number
- 1467457390
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A40188 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
21 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
202 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 65 | $98 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 39 | $129 |
| Screening Papanicolaou Smear; Obtaining, Preparing and Conveyance of Cervical Or Vaginal Smear to LaboratoryQ0091 | 37 | $49 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 31 | $140 |
| Cervical Or Vaginal Cancer Screening; Pelvic and Clinical Breast ExaminationG0101 | 30 | $42 |
Typical Medicare-allowed amounts for these services range $42–$140 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 259 | 105 |
| Progesterone, Micronizedbrand: Progesterone | 45 | 12 |
| Estradiolbrand: Estring | 43 | 22 |
| Medroxyprogesterone Acetate | 34 | — |
| Triamcinolone Acetonide | 26 | 14 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 17 | 15 |
| Alprazolam | 16 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$124 across 8 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
Registry dates
- Enumerated
- 2005-06-16
- Last updated
- 2011-11-08
Frequently asked questions
- What is Richard Williams's NPI number?
- Richard Williams's National Provider Identifier (NPI) is 1467457390, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Richard Williams's specialty?
- Richard Williams is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Richard Williams located?
- Richard Williams's practice location on file with NPPES is 1334 W Covina Blvd, San Dimas, CA 91773-3211.
- What is Richard Williams's phone number?
- The practice phone number listed in the NPPES registry for Richard Williams is (909) 599-8677.
- Does Richard Williams accept Medicare?
- Richard Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Richard Williams's NPI active?
- Yes — Richard Williams's NPI (1467457390) is active in the NPPES registry as of the last update on 2011-11-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.