KAREN ROSS TAMMELA MD
NPI 1396770905
Obstetrics & Gynecology in Santa Maria, CA
About Karen Ross Tammela Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAREN ROSS TAMMELA MD (NPI 1396770905) is an individual obstetrics & gynecology provider in Santa Maria, California, licensed in California (C153083) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS, maintains 4 additional practice locations, and is a graduate of Other (1997).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 4
Other Identifiers 1
Accepted Insurance
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
Karen Ross Tammela 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
2Medicare enrollment records show Karen Tammela reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Santa Maria, CA 93454
- Reassigned Medicare billing, California enrollment
- 263 clinicians in this Medicare group
Oneida, WI 54155
- Reassigned Medicare billing, Wisconsin enrollment
- 78 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 93454 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Karen Tammela's NPI number?
The NPI number for Karen Tammela is 1396770905. It was assigned to this individual provider in the NPPES registry on July 11, 2006.
Where is Karen Tammela located?
Karen Tammela practices at 220 S Palisade Dr Ste 203, Santa Maria, CA 93454. The listed phone number is (805) 354-7101.
What is Karen Tammela's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Karen Tammela enrolled in Medicare?
Yes. Karen Tammela 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 Karen Tammela's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Tammela reassigns Medicare benefits to 2 organizations: Pacific Central Coast Health Centers (Santa Maria, CA) and Oneida Nation (Oneida, WI). 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 Karen Tammela's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karen Tammela accept?
Health plans from Dean Health Plan list Karen Tammela as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Karen Tammela was last updated on November 8, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Karen Ross Tammela, MD · NPI 1396770905
Obstetrics & Gynecology physician in Santa Maria, California. Individual provider, active in the CMS NPPES registry since July 11, 2006.
## Identity
- **NPI:** 1396770905 (Entity type: Individual)
- **Enumerated:** July 11, 2006
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** C153083 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 220 S PALISADE DR STE 203, Santa Maria, CA 93454-8903
- **Phone:** (805) 354-7101 · **Fax:** (805) 354-7102
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Pacific Central Coast Health Centers (NPI 1205187804, Santa Maria, CA); Oneida Nation (NPI 1740278308, Oneida, WI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1997
## Record status
- **NPPES last updated:** November 8, 2023
- **Other identifiers:** Medicaid 34648200 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1396770905) · Data from the CMS NPPES public registry.