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JOHN MASSARO DO
NPI 1588665293
Internal Medicine in San Luis Obispo, CA

Active since August 03, 2005PECOS Enrolled
975 OSOS ST, SAN LUIS OBISPO, CA 93401(805) 549-0677 Get Directions Write a Review

NPPES record last updated: November 30, 2011. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About John Massaro Do NPPES

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

JOHN MASSARO DO (NPI 1588665293) is an individual internal medicine provider in San Luis Obispo, California, licensed in California (20A7971) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1588665293
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameJOHN MASSAROCredential: DO
Location Address975 OSOS STSan Luis Obispo, CA 93401-3212
Mailing Address975 Osos StSan Luis Obispo, CA 93401-3212 · (831) 242-8645
Phone(805) 549-0677
Sole ProprietorNo
Enumeration DateAugust 3, 2005
Last NPPES UpdateNovember 30, 2011
✔ NPI 1588665293 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 · 20A7971
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.
975 OSOS ST, San Luis Obispo, CA 93401
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Other Identifiers 1

Medicare UPINH55507CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

John Massaro Do 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 93401 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
$135.73 typical visit price
range $59.84 – $178.89
Typical copayment $33.93 (range $14.96 – $44.72)
Most-billed visit code 99204
Established Patient
$104.82 typical visit price
range $19.70 – $146.55
Typical copayment $26.20 (range $4.92 – $36.63)
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.

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 John Massaro's NPI number?

The NPI number for John Massaro is 1588665293. It was assigned to this individual provider in the NPPES registry on August 3, 2005.

Where is John Massaro located?

John Massaro practices at 975 Osos St, San Luis Obispo, CA 93401. The listed phone number is (805) 549-0677.

What is John Massaro's specialty?

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

Is John Massaro enrolled in Medicare?

Yes. John Massaro is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for John Massaro was last updated on November 30, 2011. 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.