KARL GREER MD
NPI 1396010740
Family Medicine in Rohnert Park, CA
About Karl Greer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KARL GREER MD (NPI 1396010740) is an individual family medicine provider in Rohnert Park, California, licensed in California (A127109) and active in the NPI registry since March 2012. He is enrolled in Medicare PECOS, maintains a secondary practice location in Petaluma, and is a graduate of University Of Texas Medical Branch At Galveston (2012).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Karl Greer Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Karl Greer reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Rohnert Park, CA 94928
- Reassigned Medicare billing, California enrollment
- 63 clinicians in this Medicare group
Santa Rosa, CA 95405
- Reassigned Medicare billing, California enrollment
- 1,699 clinicians in this Medicare group
Orinda, CA 94563
- Reassigned Medicare billing, California enrollment
- 4,479 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94928 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ROHNERT PARK, CA 94928
ROHNERT PARK, CA 94928
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Karl Greer's NPI number?
The NPI number for Karl Greer is 1396010740. It was assigned to this individual provider in the NPPES registry on March 19, 2012.
Where is Karl Greer located?
Karl Greer practices at 5900 State Farm Dr Fl 2, Rohnert Park, CA 94928. The listed phone number is (707) 559-7600.
What is Karl Greer's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Karl Greer enrolled in Medicare?
Yes. Karl Greer is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Karl Greer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karl Greer reassigns Medicare benefits to 3 organizations: Petaluma Health Center Inc (Rohnert Park, CA), Providence Medical Foundation (Santa Rosa, CA) and Sutter Bay Medical Foundation (Orinda, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Karl Greer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Karl Greer was last updated on February 1, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Karl Greer, MD · NPI 1396010740
Family Medicine physician in Rohnert Park, California. Individual provider, active in the CMS NPPES registry since March 19, 2012.
## Identity
- **NPI:** 1396010740 (Entity type: Individual)
- **Enumerated:** March 19, 2012
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** A127109 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 5900 STATE FARM DR FL 2, Rohnert Park, CA 94928-2149
- **Phone:** (707) 559-7600 · **Fax:** (707) 559-7620
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Petaluma Health Center Inc (NPI 1669870739, Rohnert Park, CA); Providence Medical Foundation (NPI 1740584473, Santa Rosa, CA); Sutter Bay Medical Foundation (NPI 1366898538, Orinda, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Texas Medical Branch At Galveston, class of 2012
## Record status
- **NPPES last updated:** February 1, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1396010740) · Data from the CMS NPPES public registry.