Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DENISE A. RETTENMAIER D.O.
NPI 1861468373
Internal Medicine - Geriatric Medicine in Yountville, CA

Q: What is the provider's specialty?

The provider's specialty is Internal Medicine with taxonomy code 207RG0300X and a focus in Geriatric Medicine.

Active since February 24, 2006PECOS Enrolled

220 CALIFORNIA DR, C/O MEDICAL STAFF OFFICE, YOUNTVILLE, CA 94599(707) 944-4716(707) 944-5052 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

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About Denise A. Rettenmaier D.o. NPPES

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

DENISE A. RETTENMAIER D.O. (NPI 1861468373) is an individual geriatric medicine provider in Yountville, California, licensed in California (20A6474) and active in the NPI registry since February 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1861468373

Entity TypeIndividualFemale

Primary Taxonomy207RG0300X

Provider Legal NameDENISE A. RETTENMAIERCredential: D.O.

Location Address220 CALIFORNIA DR, C/O MEDICAL STAFF OFFICEYountville, CA 94599-1412

Mailing AddressPo Box 942895Sacramento, CA 94295-0001 · (916) 653-0080 · Fax (916) 653-1795

Phone(707) 944-4716

Fax(707) 944-5052

Sole ProprietorNo

Enumeration DateFebruary 24, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1861468373 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Geriatric MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207RG0300X

License✔ Licensed in CA · 20A6474

Definition

An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.

220 CALIFORNIA DR, Yountville, CA 94599

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Denise A. Rettenmaier D.o. 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94599 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

$192.16 typical visit price

range $65.08 – $192.16

Typical copayment $48.04 (range $16.27 – $48.04)

Most-billed visit code 99205

Established Patient

$113.15 typical visit price

range $21.86 – $157.83

Typical copayment $28.28 (range $5.46 – $39.45)

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.