DR. ALAN M SIELAFF M.D.
NPI 1679837801
Emergency Medicine in Ann Arbor, MI
About Dr. Alan M Sielaff M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALAN M SIELAFF M.D. (NPI 1679837801) is an individual emergency medicine provider in Ann Arbor, Michigan, licensed in Michigan (4301100512) and active in the NPI registry since July 2012. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Alan M Sielaff M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
9Medicare enrollment records show Alan Sielaff reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ann Arbor, MI 48105
- Reassigned Medicare billing, Michigan enrollment
- 1,480 clinicians in this Medicare group
Ypsilanti, MI 48197
- Reassigned Medicare billing, Michigan enrollment
- 180 clinicians in this Medicare group
Livonia, MI 48154
- Reassigned Medicare billing, Michigan enrollment
- Medicare enrollment name: Epmg Of Michigan PC
- 175 clinicians in this Medicare group
Chelsea, MI 48118
- Reassigned Medicare billing, Michigan enrollment
- 147 clinicians in this Medicare group
Chelsea, MI 48118
- Reassigned Medicare billing, Michigan enrollment
- 51 clinicians in this Medicare group
Mason, MI 48854
- Reassigned Medicare billing, Michigan enrollment
- 916 clinicians in this Medicare group
Durand, MI 48429
- Reassigned Medicare billing, Michigan enrollment
- 328 clinicians in this Medicare group
Owosso, MI 48867
- Reassigned Medicare billing, Michigan enrollment
- 52 clinicians in this Medicare group
Portland, MI 48875
- Reassigned Medicare billing, Michigan enrollment
- 317 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 3
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48105 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 11
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ANN ARBOR, MI 48105
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 Alan Sielaff's NPI number?
The NPI number for Alan Sielaff is 1679837801. It was assigned to this individual provider in the NPPES registry on July 3, 2012.
Where is Alan Sielaff located?
Alan Sielaff practices at 2000 Green Rd Ste 300, Ann Arbor, MI 48105. The listed phone number is (734) 995-3764.
What is Alan Sielaff's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Alan Sielaff enrolled in Medicare?
Yes. Alan Sielaff is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Alan Sielaff's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alan Sielaff reassigns Medicare benefits to 9 organizations: Iha Health Services Corporation (Ann Arbor, MI), St Joseph Mercy Hospital (Ypsilanti, MI), Epmg Of Michigan, P.C. (Livonia, MI), Chelsea Community Hospital (Chelsea, MI), Hospitalist Physicians Medical Group Of Michigan, PC (Chelsea, MI) and 4 more organizations, listed in the Medicare section above. 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 Alan Sielaff's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Alan Sielaff accept?
Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company and Priority Health list Alan Sielaff 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.
When was this NPI record last updated?
The NPPES record for Alan Sielaff was last updated on December 30, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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. Alan M Sielaff, M.D. · NPI 1679837801
Emergency Medicine physician in Ann Arbor, Michigan. Individual provider, active in the CMS NPPES registry since July 3, 2012.
## Identity
- **NPI:** 1679837801 (Entity type: Individual)
- **Enumerated:** July 3, 2012
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 4301100512 (Michigan)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 2000 GREEN RD STE 300, Ann Arbor, MI 48105-1575
- **Phone:** (734) 995-3764
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 9 organizations under Medicare reassignment (form CMS-855R): Iha Health Services Corporation (NPI 1013194307, Ann Arbor, MI); St Joseph Mercy Hospital (NPI 1548388606, Ypsilanti, MI); Epmg Of Michigan, P.C. (NPI 1386688992, Livonia, MI); Chelsea Community Hospital (NPI 1912947409, Chelsea, MI); Hospitalist Physicians Medical Group Of Michigan, PC (NPI 1003978867, Chelsea, MI); and 4 more · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** December 30, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1679837801) · Data from the CMS NPPES public registry.