DR. JOHN S ZAZAIAN DO
NPI 1871581934
Internal Medicine in Waterford, MI
About Dr. John S Zazaian Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN S ZAZAIAN DO (NPI 1871581934) is an individual internal medicine provider in Waterford, Michigan, licensed in Michigan (5101008304) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, is affiliated with Beaumont Hospital - Dearborn, and is a graduate of Michigan State University College Of Osteopathic Medicine (1982).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
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. John S Zazaian Do 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 Reassignments
2Medicare enrollment records show John Zazaian reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Waterford, MI 48328
- Reassigned Medicare billing, Michigan enrollment
- 10 clinicians in this Medicare group
Garden City, MI 48135
- Reassigned Medicare billing, Michigan enrollment
- 17 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.
Areas of Expertise CMS Part B claims 14
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.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Beaumont Hospital - Dearborn
Acute Care Hospitals · Dearborn, MIBeaumont Hospital Royal Oak
Acute Care Hospitals · Royal Oak, MIMclaren Oakland
Acute Care Hospitals · Pontiac, MIGarden City Hospital
Acute Care Hospitals · Garden City, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48328 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 6
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Zazaian's NPI number?
The NPI number for John Zazaian is 1871581934. It was assigned to this individual provider in the NPPES registry on October 12, 2005.
Where is John Zazaian located?
John Zazaian practices at 1012 W Huron St, Waterford, MI 48328. The listed phone number is (248) 681-1880.
What is John Zazaian's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is John Zazaian enrolled in Medicare?
Yes. John Zazaian 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 John Zazaian's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Zazaian reassigns Medicare benefits to 2 organizations: Michigan Internal Medicine Associates,p.C. (Waterford, MI) and Apollo Hospitalist Group (Garden City, MI). 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 John Zazaian's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Zazaian accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 2 other insurers list John Zazaian as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is John Zazaian affiliated with any hospitals?
According to CMS data, John Zazaian is affiliated with Beaumont Hospital - Dearborn, Beaumont Hospital Royal Oak, Mclaren Oakland and Garden City Hospital.
When was this NPI record last updated?
The NPPES record for John Zazaian was last updated on August 28, 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. John S Zazaian, DO · NPI 1871581934
Internal Medicine physician in Waterford, Michigan. Individual provider, active in the CMS NPPES registry since October 12, 2005.
## Identity
- **NPI:** 1871581934 (Entity type: Individual)
- **Enumerated:** October 12, 2005
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 5101008304 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1012 W HURON ST, Waterford, MI 48328-3730
- **Phone:** (248) 681-1880 · **Fax:** (248) 681-3698
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Michigan Internal Medicine Associates,p.C. (NPI 1902818230, Waterford, MI); Apollo Hospitalist Group (NPI 1548978794, Garden City, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Osteopathic Medicine, class of 1982
## Record status
- **NPPES last updated:** August 28, 2020
- **Other identifiers:** Medicaid 165392311 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1871581934) · Data from the CMS NPPES public registry.