Gretchen Webb-Kummer, M.D.
NPI 1356475347 · Family Medicine Physician · Oakdale, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gretchen Webb-Kummer, M.D. is a Family Medicine Physician provider in Oakdale, CA (NPI 1356475347).
Provider details
- NPI number
- 1356475347
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A94868 (CA)
Specialties & taxonomies
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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
902 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 347 | $129 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 153 | $92 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 106 | $132 |
| Annual Alcohol Misuse Screening, 5 to 15 MinutesG0442 | 94 | $20 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 80 | $20 |
| Urinalysis, Manual Test81002 | 59 | $3 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 142 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 451 | 133 |
| Levothyroxine Sodium | 334 | 84 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 238 | 43 |
| Amlodipine Besylate | 237 | 66 |
| Gabapentin | 207 | 45 |
| Losartan Potassium | 198 | 57 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$224 across 13 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
- 2007-03-14
- Last updated
- 2017-02-23
Frequently asked questions
- What is Gretchen Webb-Kummer's NPI number?
- Gretchen Webb-Kummer's National Provider Identifier (NPI) is 1356475347, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gretchen Webb-Kummer's specialty?
- Gretchen Webb-Kummer is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gretchen Webb-Kummer located?
- Gretchen Webb-Kummer's practice location on file with NPPES is 1425 West H St, Oakdale, CA 95361-3590.
- What is Gretchen Webb-Kummer's phone number?
- The practice phone number listed in the NPPES registry for Gretchen Webb-Kummer is (209) 848-1005.
- Does Gretchen Webb-Kummer accept Medicare?
- Gretchen Webb-Kummer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gretchen Webb-Kummer's NPI active?
- Yes — Gretchen Webb-Kummer's NPI (1356475347) is active in the NPPES registry as of the last update on 2017-02-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.