DR. FREDERICK L JOHNSON M.D.
NPI 1104983360
Anesthesiology in Lakeport, CA
About Dr. Frederick L Johnson M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. FREDERICK L JOHNSON M.D. (NPI 1104983360) is an individual anesthesiology provider in Lakeport, California, licensed in California (A556180) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of Other (1989).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
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
Dr. Frederick L Johnson M.d. 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
5Medicare enrollment records show Frederick Johnson reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stockton, CA 95207
- Reassigned Medicare billing, California enrollment
- 11 clinicians in this Medicare group
Stockton, CA 95207
- Reassigned Medicare billing, California enrollment
- 22 clinicians in this Medicare group
Merced, CA 95340
- Reassigned Medicare billing, California enrollment
- 18 clinicians in this Medicare group
Fountain Valley, CA 97208
- Reassigned Medicare billing, California enrollment
- 59 clinicians in this Medicare group
- Reassigned Medicare billing, California enrollment
- 420 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.
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 3
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 Frederick Johnson's NPI number?
The NPI number for Frederick Johnson is 1104983360. It was assigned to this individual provider in the NPPES registry on January 3, 2007.
Where is Frederick Johnson located?
Frederick Johnson practices at 987 Parallel Dr, Lakeport, CA 95453. The listed phone number is (707) 263-7428.
What is Frederick Johnson's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Frederick Johnson enrolled in Medicare?
Yes. Frederick Johnson 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 Frederick Johnson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Frederick Johnson reassigns Medicare benefits to 5 organizations: Core Anesthesia Services PC (Stockton, CA), Core Anesthesia Provider Services PC (Stockton, CA), Bear Creek Anesthesia Medical Group (Merced, CA), Premiercare Anesthesia Fountain Valley Inc (Fountain Valley, CA) and Allied Anesthesia Medical Group Inc (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 Frederick Johnson'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 Frederick Johnson was last updated on May 20, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Dr. Frederick L Johnson, M.D. · NPI 1104983360
Anesthesiology physician in Lakeport, California. Individual provider, active in the CMS NPPES registry since January 3, 2007.
## Identity
- **NPI:** 1104983360 (Entity type: Individual)
- **Enumerated:** January 3, 2007
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** A556180 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 987 PARALLEL DR, Lakeport, CA 95453-5702
- **Phone:** (707) 263-7428 · **Fax:** (707) 263-7425
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Core Anesthesia Services PC (NPI 1952294969, Stockton, CA); Core Anesthesia Provider Services PC (NPI 1538800388, Stockton, CA); Bear Creek Anesthesia Medical Group (NPI 1154389146, Merced, CA); Premiercare Anesthesia Fountain Valley Inc (NPI 1831536531, Fountain Valley, CA); Allied Anesthesia Medical Group Inc (CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1989
## Record status
- **NPPES last updated:** May 20, 2019
- **Other identifiers:** Medicaid 00A556180 (CA); Other CN2480; Other A55618 (CA); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1104983360) · Data from the CMS NPPES public registry.