DR. MARK PETER MASTROMONACO MD
NPI 1659990059
Family Medicine in Saint Clair Shores, MI
About Dr. Mark Peter Mastromonaco Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK PETER MASTROMONACO MD (NPI 1659990059) is an individual family medicine provider in Saint Clair Shores, Michigan, licensed in Michigan (4351046408) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS and is a graduate of Other (2019).
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
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. Mark Peter Mastromonaco Md 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.
Medicare Billing Reassignment
Medicare enrollment records show Mark Mastromonaco reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Stockton, CA 95210
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
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 48081 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 17
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAINT CLAIR SHORES, MI 48081
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 Mark Mastromonaco's NPI number?
The NPI number for Mark Mastromonaco is 1659990059. It was assigned to this individual provider in the NPPES registry on April 15, 2020.
Where is Mark Mastromonaco located?
Mark Mastromonaco practices at 21400 E 11 Mile Rd, Saint Clair Shores, MI 48081. The listed phone number is (586) 498-4400.
What is Mark Mastromonaco's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Mark Mastromonaco enrolled in Medicare?
Yes. Mark Mastromonaco 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 Mark Mastromonaco's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Mastromonaco reassigns Medicare benefits to Permanente Medical Group Inc (Stockton, 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 Mark Mastromonaco'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 Mark Mastromonaco was last updated on April 15, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Dr. Mark Peter Mastromonaco, MD · NPI 1659990059
Family Medicine physician in Saint Clair Shores, Michigan. Individual provider, active in the CMS NPPES registry since April 15, 2020.
## Identity
- **NPI:** 1659990059 (Entity type: Individual)
- **Enumerated:** April 15, 2020
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 4351046408 (Michigan)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 21400 E 11 MILE RD, Saint Clair Shores, MI 48081-1566
- **Phone:** (586) 498-4400
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Permanente Medical Group Inc (NPI 1548343510, Stockton, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** April 15, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1659990059) · Data from the CMS NPPES public registry.