Karen B. Bloom, MD
Internal Medicine Physician · Petaluma, CA
Karen B. Bloom, MD is an internal medicine physician with a practice address in Petaluma, California, and NPI 1932283009, issued on Oct 25, 2006. Check the license (California G62416, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen B. Bloom
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G62416 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3900 Lakeville Hwy, Petaluma, CA 94954
- Phone
- (707) 765-3900
- Enumerated
- Oct 25, 2006
- Record last updated
- Dec 2, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00G624160 CA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 3900 Lakeville Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Alexis Becker, CNMMidwife1225112584
- Sharina Belani, MDInternal Medicine Physician1700958550
Verify Karen B. Bloom in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G62416Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% more Medicare Part D claims than the average internal medicine physician in 2024
3,554 Medicare Part D claims for 574 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 115 claims were for opioids.
Most prescribed
- Atorvastatin Calcium256 claims
- Levothyroxine Sodium234 claims
- Losartan Potassium223 claims
- Amlodipine Besylate153 claims
- Omeprazole143 claims
- Fluticasone Propionate134 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.
Karen B. Bloom among 17,696 internal medicine physician records in California
Karen B. Bloom, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
24 internal medicine physician records list a practice address in Petaluma
They are 24 of the 1,856 NPPES records with a practice address in Petaluma, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Petaluma → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sharina Belani, MDPetaluma, CA 949541700958550
- Philippe Edouard, MDPetaluma, CA 949541124029491
- Roberto Gonzalez, MDPetaluma, CA 949541801970892
- Susan Gross, MDPetaluma, CA 949541588714380
- Thomas Maloney, MDPetaluma, CA 949541275533887
- Charles Metzger, MDPetaluma, CA 949541881778959
- Nina Molin, MDPetaluma, CA 949541114059979
- Robert Ostroff, M.D.Petaluma, CA 949541912109240
Common questions
What is Karen B. Bloom, MD's NPI number?
Karen B. Bloom, MD's National Provider Identifier (NPI) is 1932283009, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen B. Bloom, MD located?
The NPPES record lists a practice address at 3900 Lakeville Hwy, Petaluma, CA, 94954. Phone: (707) 765-3900. Providers update this record themselves, so call before visiting.
How can I verify Karen B. Bloom, MD's license?
NPPES lists California license number G62416, 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 Karen B. Bloom, MD prescribe under Medicare Part D?
In 2024, Karen B. Bloom, MD had 3,554 Medicare Part D claims for 574 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.
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.