Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Karl Greer, MD

Individual provider Family Medicine Physician · NPI 1396010740

Karl Greer, MD is registered under Family Practice in Rohnert Park, California. Graduated from University of Texas Medical Branch at Galveston in 2012, 14 years ago. Practices with Petaluma Health Center Inc, a 76-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
14
Trained at
University of Texas Medical Branch at Galveston
Licensed in
CA
In the registry since
2012
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

5900 State Farm Dr Fl 2
Rohnert Park, CA 94928-2149
Phone: (707) 559-7600
Fax: (707) 559-7620
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1179 N McDowell Blvd, Petaluma, CA 94954-6559 — (707) 559-7500

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence A127109 (CA)

Record details

NPI number1396010740
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 19, 2012
Last updated in NPPESFebruary 1, 2021
Certification dateFebruary 1, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF TEXAS MEDICAL BRANCH AT GALVESTON
Graduated 2012 (14 years in practice)
Group practice Petaluma Health Center Inc — 76 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations8 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients58
Services billed 93 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $145 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Petaluma Valley Hospital Hospital · Petaluma, CA · listed as Petaluma Valley Dental
  • Sutter Santa Rosa Regional Hospital Hospital · Santa Rosa, CA · listed as Sutter Bay Hospitals
  • Providence Santa Rosa Memorial Hospital Hospital · Santa Rosa, CA
  • Sutter Care At Home Home health agency · Santa Rosa, CA

Colleagues at Petaluma Health Center Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 76 clinicians in the practice; 12 are shown here.

Other providers in Rohnert Park