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DR. MERRILL E GERSHWIN
NPI 1881677268
Internal Medicine - Rheumatology in Davis, CA

Active since November 21, 2005PECOS Enrolled
451 E. HEALTH SCIENCES DRIVE, DAVIS, CA 95616(530) 752-2884(530) 752-4669 Get Directions Write a Review

NPPES record last updated: October 26, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Merrill E Gershwin NPPES

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

DR. MERRILL E GERSHWIN (NPI 1881677268) is an individual rheumatology provider in Davis, California, licensed in California (G028104) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1881677268
Entity TypeIndividualMale
Primary Taxonomy207RR0500X
Provider Legal NameDR. MERRILL E GERSHWIN
Location Address451 E. HEALTH SCIENCES DRIVEDavis, CA 95616
Mailing Address451 E. Health Sciences DriveDavis, CA 95616 · (530) 752-2884 · Fax (530) 752-4669
Phone(530) 752-2884
Fax(530) 752-4669
Sole ProprietorNo
Enumeration DateNovember 21, 2005
Last NPPES UpdateOctober 26, 2011
✔ NPI 1881677268 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
License✔ Licensed in CA · G028104
Definition
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
451 E. HEALTH SCIENCES DRIVE, Davis, CA 95616
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Merrill E Gershwin is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Merrill Gershwin reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Regents Of The Univ Of Ca
2.2 mi
Medical Microbiology
3146 TUPPER HALL
Davis, CA 95616
  • Reassigned Medicare billing, California enrollment
  • 2,570 clinicians in this Medicare group
NPI 1053304071 (530) 752-9402

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 95616 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$137.20 typical visit price
range $60.44 – $180.85
Typical copayment $34.30 (range $15.11 – $45.21)
Most-billed visit code 99204
Established Patient
$105.95 typical visit price
range $19.88 – $148.15
Typical copayment $26.48 (range $4.97 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

JAMES CASTLES M.D.
Internal Medicine (Rheumatology)
451 E. HEALTH SCIENCES DRIVE, SUITE 6510
DAVIS, CA 95616
Yolo County (530) 752-2884
DR. GURTEJ CHEEMA M.D.
Internal Medicine (Rheumatology)
451 E. HEALTH SCIENCES DRIVE, SUITE 6510
DAVIS, CA 95616
Yolo County (530) 752-2884
DR. DICK L. ROBBINS MD
Internal Medicine (Rheumatology)
451 E. HEALTH SCIENCES DRIVE, UCDAVIS SCHOOL OF MEDICINE
DAVIS, CA 95616
Yolo County (530) 752-3903

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 Merrill Gershwin's NPI number?

The NPI number for Merrill Gershwin is 1881677268. It was assigned to this individual provider in the NPPES registry on November 21, 2005.

Where is Merrill Gershwin located?

Merrill Gershwin practices at 451 E. Health Sciences Drive, Davis, CA 95616. The listed phone number is (530) 752-2884.

What is Merrill Gershwin's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is Merrill Gershwin enrolled in Medicare?

Yes. Merrill Gershwin is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Merrill Gershwin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Merrill Gershwin reassigns Medicare benefits to Regents Of The Univ Of Ca (Davis, 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 Merrill Gershwin'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 Merrill Gershwin was last updated on October 26, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.