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DR. CAITLIN MARGARET RICHARDSON-ROYER M.D.
NPI 1922351881
Internal Medicine - Nephrology in Vallejo, CA

Active since October 17, 2012PECOS EnrolledAccepts Medicare Assignment
97.83/100
CMS Quality Rating
975 SERENO DR, VALLEJO, CA 94589(707) 651-1000 Get Directions Write a Review

NPPES record last updated: September 9, 2025. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Sep 9, 2025, Apr 24, 2024, Mar 22, 2021 and 3 more (6 updates tracked since 2017).

About Dr. Caitlin Margaret Richardson-royer M.d. NPPES

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

DR. CAITLIN MARGARET RICHARDSON-ROYER M.D. (NPI 1922351881) is an individual nephrology provider in Vallejo, California, licensed in California (A204088) and active in the NPI registry since October 2012. She is enrolled in Medicare PECOS and is a graduate of Other (2011).

NPPES Registry Identity

NPI1922351881
Entity TypeIndividualFemale
Primary Taxonomy207RN0300X
Provider Legal NameDR. CAITLIN MARGARET RICHARDSON-ROYERCredential: M.D.
Location Address975 SERENO DRVallejo, CA 94589-2441
Mailing Address5820 Owens DrPleasanton, CA 94588-3900 · (925) 737-3798 · Fax (877) 738-4262
Phone(707) 651-1000
Sole ProprietorNo
Medical School CMSOtherGraduated 2011
Enumeration DateOctober 17, 2012
Last NPPES UpdateSeptember 9, 20256 updates tracked since enumeration
NPPES CertifiedSeptember 9, 2025
✔ NPI 1922351881 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in CA · A204088
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

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. Caitlin Margaret Richardson-royer 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 ID3375858400
PECOS Enrollment IDI20251003001772
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 Reassignments

3

Medicare enrollment records show Caitlin Richardson-royer reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Hospitalist Medicine Physicians Of Ohio, Professional Corporation
Internal Medicine
6001 E BROAD ST
Columbus, OH 43213
  • Reassigned Medicare billing, Ohio enrollment
  • 776 clinicians in this Medicare group
NPI 1043572290 (614) 234-7535
Permanente Medical Group Inc
Internal Medicine
710 LAWRENCE EXPRESSWAY
Santa Clara, CA 95051
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1073606299 (408) 851-1000
Trihealth G LLC
Internal Medicine
379 DIXMYTH AVE
Cincinnati, OH 45220
  • Reassigned Medicare billing, Ohio enrollment
  • 1,126 clinicians in this Medicare group
NPI 1295862944 (513) 246-7000

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 94589 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
$145.83 typical visit price
range $65.02 – $191.95
Typical copayment $36.45 (range $16.25 – $47.98)
Most-billed visit code 99204
Established Patient
$113.05 typical visit price
range $21.86 – $157.69
Typical copayment $28.26 (range $5.46 – $39.42)
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.

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.

97.83/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality80.97
Promoting Interoperability100
Improvement Activities40

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.

DR. ROBERTA YIWUN WANG M.D.
Physical Medicine & Rehabilitation
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 651-5128
RIHONG ZHOU
Pharmacist
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 651-2072
EVAN HIRSCHBEIN
Student in an Organized Health Care Education/Training Program
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 339-2074
MS. JEAN BROADNAX LCSW
Social Worker (Clinical)
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 651-4423
SEAN NISAM
Student in an Organized Health Care Education/Training Program
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 651-4071
LI M. TSANG MD
Anesthesiology
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 651-1000
DONN R. ERICKSON MD
Family Medicine
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 651-1000
JOHN S. WOOD MD
Surgery
975 SERENO DR
VALLEJO, CA 94589
Napa County (707) 651-1000

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 Caitlin Richardson-royer's NPI number?

The NPI number for Caitlin Richardson-royer is 1922351881. It was assigned to this individual provider in the NPPES registry on October 17, 2012.

Where is Caitlin Richardson-royer located?

Caitlin Richardson-royer practices at 975 Sereno Dr, Vallejo, CA 94589. The listed phone number is (707) 651-1000.

What is Caitlin Richardson-royer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Caitlin Richardson-royer enrolled in Medicare?

Yes. Caitlin Richardson-royer 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 Caitlin Richardson-royer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Caitlin Richardson-royer reassigns Medicare benefits to 3 organizations: Hospitalist Medicine Physicians Of Ohio, Professional Corporation (Columbus, OH), Permanente Medical Group Inc (Santa Clara, CA) and Trihealth G LLC (Cincinnati, OH). 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 Caitlin Richardson-royer'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 Caitlin Richardson-royer was last updated on September 9, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.