DR. NICHOLAS MAXIMILLIAN KIELHORN (M.D.) – Family Medicine Physician, NPI 1821240128

DR. NICHOLAS MAXIMILLIAN KIELHORN (M.D.) is a healthcare provider. based in Brooklyn, Michigan. specializing in FAMILY PRACTICE. They hold the professional credentials M.D.. They hold a License No. 4301090658 (MI). The NPI Number for DR. NICHOLAS MAXIMILLIAN KIELHORN (M.D.) is 1821240128

Main info

Male
19 Years Of Experience
Accepts Medicare Assignment
Name
DR. NICHOLAS MAXIMILLIAN KIELHORN (M.D.)
NPI
1821240128
Phone
(517) 592-8033
Address
212 S MAIN ST STE A
Enumeration Date
17 October 2008
Last Update Date
15 November 2023

Doctor Profile

Medical School Name
OTHER
Secondary Phone
5178791505
Graduation Year
2007 (19 years ago)
PAC ID
0244425403
Group Practice PAC ID
2365359932
Professional Enrollment ID
I20230109002034
Address ID
MI492018801JA5025XRDXX400
Data current as of
20 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience58
Completeness75
Years active:17State licenses:1Digital endpointsOther names

4,418 FAMILY PRACTICE in MI

Provider Addresses for DR. NICHOLAS MAXIMILLIAN KIELHORN (M.D.)

  • 212 S MAIN ST STE A

    BROOKLYN, MI 492309114

    Phone: (517) 592-8033

    Fax: (517) 592-3959

    Type: Location

  • 24 FRANK LLOYD WRIGHT DR LBBY J2000

    ANN ARBOR, MI 481059484

    Phone: (734) 747-6766

    Type: Mailing

  • 801 ROSEHILL RD

    JACKSON, MI 492021762

    Phone: (517) 212-2008

    Type: Mailing

  • 103 S JACKSON ST STE 200

    JACKSON, MI 492012211

    Phone: (517) 212-2008

    Type: Mailing

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

CMS reports 1 Open Payments records for all available years, with a total value of $21.

Total Amount is formed as General ($21) + Research ($0) + Ownership ($0) = $21.

Last reported payment date: 2024-04-29 • Largest payer in this snapshot: Otsuka America Pharmaceutical, Inc. ($21).

Total Amount

$21

General + Research + Ownership

Payments

1

Total payment records

General Amount

$21

General payments

Research Amount

$0

Research funding

Ownership Amount

$0

Ownership interests

Ownership Count

0

Ownership records

Last Payment Date

2024-04-29

Latest reported date

Top Companies

Largest payers in this snapshot

View all Open Payments →|Open Payments Risk Radar →

Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

PECOS enrollment status

Participating (accepts Medicare assignment)

Enrollment effective: 2023-01-09

PECOS data refreshed: 2026-05-27

Medicare revalidation (CMS due date list)

Due date not assigned yet

CMS is tracking 3 Medicare enrollment records; no due dates published yet.

Enrollment records

3

Earliest due date

Not assigned (TBD)

CMS data updated

2026-06-01

Revalidation progress

  1. Medicare enrolled
  2. On CMS revalidation list
  3. Due date assigned
  4. Revalidate in PECOS

CMS enrollment records

Enrollment IDTypeSpecialtyStateDue date
I20101112000893IFamily PracticeMITBD
I20220604000362IFamily PracticeOHTBD
I20230109002034IFamily PracticeINTBD

What to do next

  • No action required while the due date shows TBD.
  • Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
  • Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.

Verify on CMS Revalidation Lookup Tool

Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS

Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

Top Medicare procedures (2023) · refreshed 2026-05-27

HCPCSDescriptionServicesBeneficiariesMedicare allowed
G0180Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and362359$0
99306Initial nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes150137$0
G0179Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians a125105$0
99309Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes7950$0
View full utilization report →

Insurance plans in this area (ZIP 49230)

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Provider's Procedures

DR. NICHOLAS MAXIMILLIAN KIELHORN (M.D.) performs procedures in FAMILY PRACTICE. See the list of HCPCS codes below.
SpecialtyPractice State
HCPCS Code
Description
Service Count
Beneficiary Count
FAMILY MEDICINEMI83036Hemoglobin A1C level9661
FAMILY MEDICINEMI85610Blood test, clotting time12635

Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.
PAC ID: 2365359932View full group profile
NameSpecialtyState
Physical Therapist In Private PracticeWV
Occupational Therapist In Private PracticePA
Occupational Therapist In Private PracticeDC
Internal MedicineMI
Anesthesiology, Interventional Pain ManagementMI
Occupational Therapist In Private PracticeWV
Family PracticeMI
Family PracticeMI
Physical Therapist In Private PracticeMO
Occupational Therapist In Private PracticeMD

Reviews

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Frequently asked questions

How do payers reference DR. NICHOLAS MAXIMILLIAN KIELHORN (M.D.)?
For DR. NICHOLAS MAXIMILLIAN KIELHORN (M.D.), use NPI 1821240128 as the unique 10-digit identifier.
Would DR. NICHOLAS MAXIMILLIAN KIELHORN (M.D.) appear as active to a payer?
You can treat DR. NICHOLAS MAXIMILLIAN KIELHORN (M.D.) as active for directory purposes; confirm clinical privileges separately.
How would a patient describe DR. NICHOLAS MAXIMILLIAN KIELHORN (M.D.)'s focus?
For DR. NICHOLAS MAXIMILLIAN KIELHORN (M.D.), the primary taxonomy reads as Family Medicine Physician. Clinical services aligned with this taxonomy classification.
Is DR. NICHOLAS MAXIMILLIAN KIELHORN (M.D.) associated with Brooklyn?
Public fields place DR. NICHOLAS MAXIMILLIAN KIELHORN (M.D.) around Brooklyn, Michigan. Always confirm the exact site before visiting.
What does 6 location(s) imply?
6 practice locations appear in the available data.

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