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DR. KENNETH E GRUBBS D.O.
NPI 1588773295
Family Medicine in Orange, CA

Active since August 29, 2006PECOS EnrolledAccepts Medicare Assignment
867 S TUSTIN ST, ORANGE, CA 92866(714) 771-1420(714) 771-6918 Get Directions Write a Review

NPPES record last updated: March 4, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Kenneth E Grubbs D.o. NPPES

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

DR. KENNETH E GRUBBS D.O. (NPI 1588773295) is an individual family medicine provider in Orange, California, licensed in California (20A6349) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1991).

NPPES Registry Identity

NPI1588773295
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. KENNETH E GRUBBSCredential: D.O.
Location Address867 S TUSTIN STOrange, CA 92866-3426
Mailing Address867 S Tustin StOrange, CA 92866-3426 · (714) 771-1420 · Fax (714) 771-6918
Phone(714) 771-1420
Fax(714) 771-6918
Sole ProprietorYes
Medical School CMSOtherGraduated 1991
Enumeration DateAugust 29, 2006
Last NPPES UpdateMarch 4, 2014
✔ NPI 1588773295 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · 20A6349
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
867 S TUSTIN ST, Orange, CA 92866
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Other Identifiers 1

Medicare UPING16948CA

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. Kenneth E Grubbs D.o. 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 ID6507082369
PECOS Enrollment IDI20140812002576
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 Kenneth Grubbs reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

William H Nuesse M D And Mary Ann Nuesse D O A Medical Corporation
Same address
Clinic/Center
867 S TUSTIN ST
Orange, CA 92866
  • Reassigned Medicare billing, California enrollment
  • 3 clinicians in this Medicare group
NPI 1508994088 (714) 771-1420

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 92866 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
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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 9

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JOHN DIAB PA
Physician Assistant
867 S TUSTIN ST
ORANGE, CA 92866
Orange County (714) 771-1420
BE CHIROPRACTIC PC
Chiropractor
867 S TUSTIN ST
ORANGE, CA 92866
Orange County (714) 771-1420
MR. SIMON STEPHEN LEE YAO NP
Nurse Practitioner (Family)
867 S TUSTIN ST
ORANGE, CA 92866
Orange County (714) 771-1420
FRANK FONG YOUNG M.D.
General Practice
867 S TUSTIN ST
ORANGE, CA 92866
Orange County (714) 771-1420
WILLIAM H NUESSE M D AND MARY ANN NUESSE D O A MEDICAL CORPORATION
Clinic/Center
867 S TUSTIN ST
ORANGE, CA 92866
Orange County (714) 771-1420
MELISSA CHANG NP
Nurse Practitioner (Family)
867 S TUSTIN ST
ORANGE, CA 92866
Orange County (714) 771-1420
DR. MARYANN NUESSE D.O.
Family Medicine (Adult Medicine)
867 S TUSTIN ST
ORANGE, CA 92866
Orange County (714) 771-1420
NEIL CHEN
Physician Assistant
867 S TUSTIN ST
ORANGE, CA 92866
Orange County (714) 771-1420

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 Kenneth Grubbs's NPI number?

The NPI number for Kenneth Grubbs is 1588773295. It was assigned to this individual provider in the NPPES registry on August 29, 2006.

Where is Kenneth Grubbs located?

Kenneth Grubbs practices at 867 S Tustin St, Orange, CA 92866. The listed phone number is (714) 771-1420.

What is Kenneth Grubbs's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Kenneth Grubbs enrolled in Medicare?

Yes. Kenneth Grubbs 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 Kenneth Grubbs's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kenneth Grubbs reassigns Medicare benefits to William H Nuesse M D And Mary Ann Nuesse D O A Medical Corporation (Orange, 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 Kenneth Grubbs'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 Kenneth Grubbs was last updated on March 4, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.