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RONALD GARREN M.D.
NPI 1720152663
Internal Medicine in Monterey, CA

Active since November 20, 2006PECOS EnrolledAccepts Medicare Assignment
96.48/100
CMS Quality Rating
5 HARRIS CT BLDG T2ND, # 201, MONTEREY, CA 93940(831) 642-4060(831) 655-1277 Get Directions Write a Review

NPPES record last updated: March 16, 2012. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Ronald Garren M.d. NPPES

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

RONALD GARREN M.D. (NPI 1720152663) is an individual internal medicine provider in Monterey, California, licensed in California (G19297) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of Harvard Medical School (1966).

NPPES Registry Identity

NPI1720152663
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameRONALD GARRENCredential: M.D.
Location Address5 HARRIS CT BLDG T2ND, # 201Monterey, CA 93940-5750
Mailing Address5 Harris Ct Bldg TMonterey, CA 93940-5750 · (831) 375-4105 · Fax (831) 372-5722
Phone(831) 642-4060
Fax(831) 655-1277
Sole ProprietorNo
Medical School CMSHarvard Medical SchoolGraduated 1966
Enumeration DateNovember 20, 2006
Last NPPES UpdateMarch 16, 2012
✔ NPI 1720152663 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · G19297
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
5 HARRIS CT BLDG T2ND, Monterey, CA 93940
Open in Google Maps ↗

Other Identifiers 1

Other00G192970CA · Medicare Provider #

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

Ronald Garren 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 ID2769484542
PECOS Enrollment IDI20070207000413
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 Ronald Garren reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Monterey Bay Oncology A Medical Corporation
1.2 mi
Hematology & Oncology
5 HARRIS CT, BLDG T, STE. 201
Monterey, CA 93940
  • Reassigned Medicare billing, California enrollment
  • 31 clinicians in this Medicare group
NPI 1972542959 (831) 375-4105
Community Hospital Of The Monterey Peninsula
5.3 mi
General Acute Care Hospital
23625 HOLMAN HWY
Monterey, CA 93940
  • Reassigned Medicare billing, California enrollment
  • 245 clinicians in this Medicare group
NPI 1225285810 (831) 624-5311
Monterey Bay Observation Medicine
5.3 mi
Emergency Medicine
23625 HOLMAN HWY
Monterey, CA 93940
  • Reassigned Medicare billing, California enrollment
  • 51 clinicians in this Medicare group
NPI 1205225505 (831) 625-4900

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

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
62 services32 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93940 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
$139.84 typical visit price
range $61.69 – $184.30
Typical copayment $34.96 (range $15.42 – $46.07)
Most-billed visit code 99204
Established Patient
$108.04 typical visit price
range $20.34 – $151.02
Typical copayment $27.01 (range $5.08 – $37.75)
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.

96.48/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality92.97
Improvement Activities40

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 Ronald Garren's NPI number?

The NPI number for Ronald Garren is 1720152663. It was assigned to this individual provider in the NPPES registry on November 20, 2006.

Where is Ronald Garren located?

Ronald Garren practices at 5 Harris Ct Bldg T2nd # 201, Monterey, CA 93940. The listed phone number is (831) 642-4060.

What is Ronald Garren's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Ronald Garren enrolled in Medicare?

Yes. Ronald Garren 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 Ronald Garren's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ronald Garren reassigns Medicare benefits to 3 organizations: Monterey Bay Oncology A Medical Corporation (Monterey, CA), Community Hospital Of The Monterey Peninsula (Monterey, CA) and Monterey Bay Observation Medicine (Monterey, CA). 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 Ronald Garren'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 Ronald Garren was last updated on March 16, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.