NPPES file of Aug 9, 2026

Josephine Mumbi Githua, NP

Family Medicine Physician · Oakley, CA

Josephine Mumbi Githua, NP is a family medicine physician with a practice address in Oakley, California, and NPI 1033589486, issued on Sep 29, 2015. Check the license (California NP95001279, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1033589486
Name
Josephine Mumbi Githua
Credential
NP
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
NP95001279 CA
Self-reported in NPPES; status is on the state search
Practice location
2021 Main St, Oakley, CA 94561
Phone
(925) 776-8200
Enumerated
Sep 29, 2015
Record last updated
Sep 29, 2015 (not updated in 11 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
Download card Updates feed

Also registered at 2021 Main St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Sarah Broome, PAPhysician Assistant1174962054
  2. Crystal ChanPhysician Assistant1629781703
  3. Shuinn Chang, NPNurse Practitioner1003249244
  4. Yue FengFamily Medicine Physician1114902285
  5. Edward Kim, MDFamily Medicine Physician1124342977
  6. Christina Loeliger, FNPNurse Practitioner1356614762

Verify Josephine Mumbi Githua in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license NP95001279    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

85% fewer Medicare Part D claims than the average family medicine physician in 2024

516 Medicare Part D claims for 158 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.

  1. Josephine Githua516
  2. Specialty average3,544

Most prescribed

  1. Lisinopril28 claims
  2. Albuterol Sulfate Hfa25 claims
  3. Famotidine22 claims
  4. Azithromycin21 claims
  5. Ibuprofen18 claims
  6. Metformin Hcl14 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $54.04

3 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Josephine Githua$54.04
  2. Specialty average$902.55

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

4 family medicine physician records list a practice address in Oakley

They are 4 of the 197 NPPES records with a practice address in Oakley, and 17,133 family medicine physician records in California.

All 4 in Oakley → All 17,133 in California → Every provider in Oakley →

Other family medicine physician records in California

  1. Omer Aba-Omer, MDSanta Monica, CA1649702093
  2. Michelle Ababa, MDWilmington, CA1710922513
  3. Anna Tzeitel Abalos, MDRoseville, CA1720200017
  4. Adan Abarca, MDAnaheim, CA1760553689
  5. Vanessa Abarca, DOVentura, CA1952040859
  6. Lorraine Abate, M.D.Sacramento, CA1104840008
  7. Robert Abatecola, MDCastro Valley, CA1669551719
  8. Romeo Abaya, M.D.Cottonwood, CA1598053506
  9. Effiem Abbah, MD, MPHSan Francisco, CA1821185133
  10. Khuzeman Abbasi, MDSanta Rosa, CA1841979952

Common questions

What is Josephine Mumbi Githua, NP's NPI number?

Josephine Mumbi Githua, NP's National Provider Identifier (NPI) is 1033589486, issued on Sep 29, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Josephine Mumbi Githua, NP located?

The NPPES record lists a practice address at 2021 Main St, Oakley, CA, 94561. Phone: (925) 776-8200. Providers update this record themselves, so call before visiting.

How can I verify Josephine Mumbi Githua, NP's license?

NPPES lists California license number NP95001279, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Josephine Mumbi Githua, NP prescribe under Medicare Part D?

In 2024, Josephine Mumbi Githua, NP had 516 Medicare Part D claims for 158 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.