WILLIAM PAUL III HARTMANN (MD) – Psychiatry Physician, NPI 1255318408

WILLIAM PAUL III HARTMANN (MD) is a healthcare provider. based in Mason, Ohio. specializing in Psychiatry Physician. They hold the professional credentials MD. They hold a License No. 35-079023 (OH). The NPI Number for WILLIAM PAUL III HARTMANN (MD) is 1255318408

Main info

Male
27 Years Of Experience
Accepts Medicare Assignment
Name
WILLIAM PAUL III HARTMANN (MD)
NPI
1255318408
Phone
(513) 536-0232
Address
4075 OLD WESTERN ROW RD
Enumeration Date
29 December 2005
Last Update Date
4 September 2015

Doctor Profile

Medical School Name
NORTHEASTERN OHIO UNIVERSITY COLLEGE OF MEDICINE
Secondary Phone
5135364673
Graduation Year
1999 (27 years ago)
PAC ID
6901984517
Group Practice PAC ID
7012236409
Professional Enrollment ID
I20080423000238
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience54
Completeness75
Years active:20State licenses:1Digital endpointsOther names

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Provider Addresses for WILLIAM PAUL III HARTMANN (MD)

  • Old Western Row Road, Mason, Warren County, Ohio, 45040, United States

    MASON, OH 450403104

    Phone: (513) 536-0232

    Fax: (513) 536-0609

    Mailing address matches the actual address.

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 $89.

Total Amount is formed as General ($89) + Research ($0) + Ownership ($0) = $89.

Last reported payment date: 2023-05-11 • Largest payer in this snapshot: Axsome Therapeutics, Inc. ($89).

Total Amount

$89

General + Research + Ownership

Payments

1

Total payment records

General Amount

$89

General payments

Research Amount

$0

Research funding

Ownership Amount

$0

Ownership interests

Ownership Count

0

Ownership records

Last Payment Date

2023-05-11

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: 2008-04-23

PECOS data refreshed: 2026-05-27

Medicare revalidation (CMS due date list)

Due date not assigned yet

CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.

Enrollment records

1

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
I20080423000238IPsychiatryOHTBD

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.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 45040)

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Provider's Procedures

WILLIAM PAUL III HARTMANN (MD) performs procedures in Psychiatry Physician. See the list of HCPCS codes below.
SpecialtyPractice State
HCPCS Code
Description
Service Count
Beneficiary Count
PSYCHIATRYOH90792Psychiatric diagnostic evaluation with medical services2424
PSYCHIATRYOH90833Psychotherapy, 30 minutes with patient and/or family member3616

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: 7012236409View full group profile
NameSpecialtyState
Clinical PsychologistOH
Clinical Social WorkerOH
Mental Health CounselorOH
Mental Health CounselorOH
Nurse PractitionerOH
Mental Health CounselorOH
-IL
Nurse PractitionerOH
Clinical Social WorkerOH
Mental Health CounselorOH

Reviews

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Frequently asked questions

Can I verify WILLIAM PAUL III HARTMANN (MD) with an NPI only?
You can start verification with NPI 1255318408 for WILLIAM PAUL III HARTMANN (MD), then check state licensing separately.
Is WILLIAM PAUL III HARTMANN (MD) listed as active for patients and plans?
The listing shows WILLIAM PAUL III HARTMANN (MD) as active in the NPI system.
What is WILLIAM PAUL III HARTMANN (MD) best known for clinically?
Directory data describes WILLIAM PAUL III HARTMANN (MD) with Psychiatry Physician. Clinical services aligned with this taxonomy classification.
What area does WILLIAM PAUL III HARTMANN (MD) serve?
WILLIAM PAUL III HARTMANN (MD)'s listing highlights Mason, Ohio; more addresses can appear in NPPES.
How many locations tie to this NPI?
2 practice locations appear in the available data.

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