DR. TOLAM NGUYEN D.O.
NPI 1437311339
Internal Medicine in Lansing, MI
About Dr. Tolam Nguyen D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TOLAM NGUYEN D.O. (NPI 1437311339) is an individual internal medicine provider in Lansing, Michigan, licensed in Michigan (5101017715) and active in the NPI registry since July 2008. She is enrolled in Medicare PECOS, is affiliated with Edward W Sparrow Hospital, and is a graduate of Michigan State University College Of Osteopathic Medicine (2008).
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 and accepts Medicare assignment
Dr. Tolam Nguyen D.o. 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
5Medicare enrollment records show Tolam Nguyen reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Lansing, MI 48912
- Reassigned Medicare billing, Michigan enrollment
- 916 clinicians in this Medicare group
Lansing, MI 48912
- Reassigned Medicare billing, Michigan enrollment
- 104 clinicians in this Medicare group
Lansing, MI 48912
- Reassigned Medicare billing, Michigan enrollment
- 115 clinicians in this Medicare group
Saint Johns, MI 48879
- Reassigned Medicare billing, Michigan enrollment
- 114 clinicians in this Medicare group
Portland, MI 48875
- Reassigned Medicare billing, Michigan enrollment
- Also billed through NPI 1700820065 (Michigan)
- 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
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Edward W Sparrow Hospital
Acute Care Hospitals · Lansing, MISparrow Ionia Hospital
Critical Access Hospitals · Ionia, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48912 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LANSING, MI 48912
LANSING, MI 48912
LANSING, MI 48912
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 Tolam Nguyen's NPI number?
The NPI number for Tolam Nguyen is 1437311339. It was assigned to this individual provider in the NPPES registry on July 1, 2008.
Where is Tolam Nguyen located?
Tolam Nguyen practices at 1540 Lake Lansing Rd Suite 102, Lansing, MI 48912. The listed phone number is (517) 913-3810.
What is Tolam Nguyen's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Tolam Nguyen enrolled in Medicare?
Yes. Tolam Nguyen 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 Tolam Nguyen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tolam Nguyen reassigns Medicare benefits to 5 organizations: Edward W. Sparrow Hospital Association (Lansing, MI), Sparrow Specialty Hospital (Lansing, MI), Vituity - Michigan Hospitalists PC (Lansing, MI), Sparrow Clinton Hospital (Saint Johns, MI) and Sparrow Ionia Hospital (Portland, 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 Tolam Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Tolam Nguyen accept?
Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company and Priority Health list Tolam Nguyen 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 Tolam Nguyen affiliated with any hospitals?
According to CMS data, Tolam Nguyen is affiliated with Edward W Sparrow Hospital and Sparrow Ionia Hospital.
When was this NPI record last updated?
The NPPES record for Tolam Nguyen was last updated on March 1, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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. Tolam Nguyen, D.O. · NPI 1437311339
Internal Medicine physician in Lansing, Michigan. Individual provider, active in the CMS NPPES registry since July 1, 2008.
## Identity
- **NPI:** 1437311339 (Entity type: Individual)
- **Enumerated:** July 1, 2008
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 5101017715 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1540 LAKE LANSING RD, SUITE 102, Lansing, MI 48912-3756
- **Phone:** (517) 913-3810 · **Fax:** (517) 913-3811
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Edward W. Sparrow Hospital Association (NPI 1295788404, Lansing, MI); Sparrow Specialty Hospital (NPI 1437655842, Lansing, MI); Vituity - Michigan Hospitalists PC (NPI 1487278156, Lansing, MI); Sparrow Clinton Hospital (NPI 1306893078, Saint Johns, MI); Sparrow Ionia Hospital (NPI 1295801108, Portland, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Osteopathic Medicine, class of 2008
## Record status
- **NPPES last updated:** March 1, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1437311339) · Data from the CMS NPPES public registry.