Marianne Louise Kramer, MD
Internal Medicine Physician · Sonoma, CA
Marianne Louise Kramer, MD is an internal medicine physician with a practice address in Sonoma, California, and NPI 1801848601, issued on May 17, 2006. Check the license (California G695540, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marianne Louise Kramer
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G695540 CA
Self-reported in NPPES; status is on the state search - Practice location
- 15000 Arnold Drive, Sonoma, CA 95431
- Phone
- (707) 938-6556
- Enumerated
- May 17, 2006
- Record last updated
- Jul 13, 2026
- Entity
- Type 1 · individual
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Verify Marianne Louise Kramer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G695540Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
38 Medicare Part D claims for 11 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 39% of 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.
Marianne Louise Kramer among 17,696 internal medicine physician records in California
Marianne Louise Kramer, 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 updated2026 · 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).
12 internal medicine physician records list a practice address in Sonoma
They are 12 of the 395 NPPES records with a practice address in Sonoma, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Sonoma → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Kunal GoelFort Bragg, CA 954371619610714
- Elizabeth KhanFort Bragg, CA 954371851754279
- Jason Kirkman, MDFort Bragg, CA 954371487665410
- Niranjana Parthasarathi, MDCloverdale, CA 954251134185473
- Richard Sacks-Wilner, MDFort Bragg, CA 954371992717920
Common questions
What is Marianne Louise Kramer, MD's NPI number?
Marianne Louise Kramer, MD's National Provider Identifier (NPI) is 1801848601, issued on May 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marianne Louise Kramer, MD located?
The NPPES record lists a practice address at 15000 Arnold Drive, Sonoma, CA, 95431. Phone: (707) 938-6556. Providers update this record themselves, so call before visiting.
How can I verify Marianne Louise Kramer, MD's license?
NPPES lists California license number G695540, 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 Marianne Louise Kramer, MD prescribe under Medicare Part D?
In 2024, Marianne Louise Kramer, MD had 38 Medicare Part D claims for 11 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.