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DR. HAROLD FLETCHER KEYSERLING M.D.
NPI 1023035995
Radiology - Diagnostic Neuroimaging in Sacramento, CA

Active since July 16, 2006PECOS EnrolledAccepts Medicare Assignment
3161 L ST, SACRAMENTO, CA 95816(916) 878-3495(916) 736-5533 Get Directions Write a Review

NPPES record last updated: November 14, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Harold Fletcher Keyserling M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. HAROLD FLETCHER KEYSERLING M.D. (NPI 1023035995) is an individual diagnostic neuroimaging provider in Sacramento, California, licensed in California (C198022) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Decatur, and is a graduate of Medical College Of Georgia School Of Medicine (1999).

NPPES Registry Identity

NPI1023035995
Entity TypeIndividualMale
Primary Taxonomy2085D0003X
Provider Legal NameDR. HAROLD FLETCHER KEYSERLINGCredential: M.D.
Location Address3161 L STSacramento, CA 95816-5234
Mailing AddressPo Box 255228Sacramento, CA 95865-5228 · (800) 470-0071 · Fax (916) 854-6769
Phone(916) 878-3495
Fax(916) 736-5533
Sole ProprietorNo
Medical School CMSMedical College Of Georgia School Of MedicineGraduated 1999
Enumeration DateJuly 16, 2006
Last NPPES UpdateNovember 14, 2025
NPPES CertifiedNovember 14, 2025
✔ NPI 1023035995 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyRadiology · Diagnostic NeuroimagingAllopathic & Osteopathic Physicians
Taxonomy Code2085D0003X
License✔ Licensed in CA · C198022
Definition
A licensed physician, who has completed a residency program in Neurology, and who has additional training, experience, and competence in the standards of performance and interpretation of Magnetic Resonance Imaging (MRI / MRA) of the head, spine, and peripheral nerves, and Computed Tomography (CT) of the head and spine. Physicians are trained in the administration of contrast media and the recognition and treatment of adverse reactions to contrast media. Neuroimaging training encompasses thorough knowledge of clinical neurology, neurophysiology, neuroanatomy, neurochemistry, neuropharmacology, and dynamics of cerebrospinal fluid circulation. Physicians possess special expertise in the technical aspects and clinical applications of each of the modalities and techniques of neuroimaging.
Also ListedRadiology · NeuroradiologyTaxonomy 2085N0700X · License 200201269 (NC), 782376 (CA)
Also ListedRadiology · Diagnostic RadiologyTaxonomy 2085R0202X · License 782376 (CA)
3161 L ST, Sacramento, CA 95816
Open in Google Maps ↗

Secondary Practice Location 1

Location 11670 Clairmont RdDecatur, GA 30033-4004 · Phone (404) 321-6111

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas.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

Dr. Harold Fletcher Keyserling 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.

PECOS PAC ID4284524604
PECOS Enrollment IDI20250224002012
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Harold Keyserling reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sutter Valley Medical Foundation
4.0 mi
Multi-Specialty
2700 GATEWAY OAKS DR
Sacramento, CA 95833
  • Reassigned Medicare billing, California enrollment
  • 3,056 clinicians in this Medicare group
NPI 1952327256 (800) 470-0071

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

JAMES J STEIDLER MD
Radiology (Neuroradiology)
3161 L ST
SACRAMENTO, CA 95816
Sacramento County (916) 453-9999
MACKENZIE MARIE CANTERBURY DO
Radiology (Diagnostic Radiology)
3161 L ST
SACRAMENTO, CA 95816
Sacramento County (916) 878-3495
CHRISTOPHER SCHAEFER MD
Radiology (Diagnostic Radiology)
3161 L ST
SACRAMENTO, CA 95816
Sacramento County (916) 453-9999
GAIL MARY EGAN N.P.
Nurse Practitioner
3161 L ST
SACRAMENTO, CA 95816
Sacramento County (916) 453-9999
THYMUR CHAUDHRY M.D.
Radiology (Neuroradiology)
3161 L ST
SACRAMENTO, CA 95816
Sacramento County (168) 877-8629
MICHAEL J HECIMOVICH D.O.
Radiology (Diagnostic Radiology)
3161 L ST
SACRAMENTO, CA 95816
Sacramento County (916) 453-9999
DR. SONJA ISABELLE DARDENELLE M.D.
Radiology (Diagnostic Radiology)
3161 L ST
SACRAMENTO, CA 95816
Sacramento County (916) 878-3495
ARIA NAOMI SASAKI M.D.
Radiology (Vascular & Interventional Radiology)
3161 L ST
SACRAMENTO, CA 95816
Sacramento County (916) 453-9999

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 Harold Keyserling's NPI number?

The NPI number for Harold Keyserling is 1023035995. It was assigned to this individual provider in the NPPES registry on July 16, 2006.

Where is Harold Keyserling located?

Harold Keyserling practices at 3161 L St, Sacramento, CA 95816. The listed phone number is (916) 878-3495.

What is Harold Keyserling's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Neuroimaging, with taxonomy code 2085D0003X.

Is Harold Keyserling enrolled in Medicare?

Yes. Harold Keyserling 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 organization bills Medicare for Harold Keyserling's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Harold Keyserling reassigns Medicare benefits to Sutter Valley Medical Foundation (Sacramento, CA). The 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 Harold Keyserling's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Harold Keyserling accept?

Health plans from Blue Cross and Blue Shield of Texas list Harold Keyserling 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 Harold Keyserling was last updated on November 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.