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DR. TIMOTHY GERARD O CALLAGHAN DO
NPI 1982604617
Family Medicine in Ludington, MI

Active since July 22, 2005PECOS Enrolled
922 LAWNDALE ST, LUDINGTON, MI 49431(231) 845-7380(231) 843-8499 Get Directions Write a Review

NPPES record last updated: September 5, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Timothy Gerard O Callaghan Do NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. TIMOTHY GERARD O CALLAGHAN DO (NPI 1982604617) is an individual family medicine provider in Ludington, Michigan, licensed in Michigan (009392) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1982604617
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. TIMOTHY GERARD O CALLAGHANCredential: DO
Location Address922 LAWNDALE STLudington, MI 49431-1928
Mailing Address100 Michigan St Ne, Mc 845Grand Rapids, MI 49503-2560
Phone(231) 845-7380
Fax(231) 843-8499
Sole ProprietorNo
Enumeration DateJuly 22, 2005
Last NPPES UpdateSeptember 5, 2014
✔ NPI 1982604617 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in MI · 009392
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
922 LAWNDALE ST, Ludington, MI 49431
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Timothy Gerard O Callaghan Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Timothy O Callaghan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Spectrum Health Primary Care Partners
47 mi
Physical Therapist
2009 HOLTON ROAD
Muskegon, MI 49445
  • Reassigned Medicare billing, Michigan enrollment
  • 2,446 clinicians in this Medicare group
NPI 1386194538 (616) 486-6790

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 49431 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$84.74 typical visit price
range $54.34 – $166.68
Typical copayment $21.18 (range $13.58 – $41.67)
Most-billed visit code 99203
Established Patient
$96.44 typical visit price
range $17.09 – $135.40
Typical copayment $24.11 (range $4.27 – $33.85)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 16

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

NICOLE MARIE TOMPKINS PA
Physician Assistant
922 LAWNDALE ST
LUDINGTON, MI 49431
Mason County (231) 845-7380
ASHLEIGH ELAINE GRAHAM PA
Physician Assistant
922 LAWNDALE ST
LUDINGTON, MI 49431
Mason County (231) 845-7380
SPECTRUM HEALTH PRIMARY CARE PARTNERS
Family Medicine
922 LAWNDALE ST
LUDINGTON, MI 49431
Mason County (231) 845-7380
LEAH ERIN KRUK DNP FNP
Nurse Practitioner (Family)
922 LAWNDALE ST
LUDINGTON, MI 49431
Mason County (231) 845-7380
MEMORIAL MEDICAL CENTER OF WEST MICHIGAN
Family Medicine
922 LAWNDALE ST
LUDINGTON, MI 49431
Mason County (231) 845-7380
MADISON LEIGH CHAPMAN FNP-C
Nurse Practitioner (Family)
922 LAWNDALE ST
LUDINGTON, MI 49431
Mason County (231) 845-7380
MEMORIAL MEDICAL CENTER OF WEST MICHIGAN
Clinic/Center (Rural Health)
922 LAWNDALE ST
LUDINGTON, MI 49431
Mason County (231) 845-7380
MEMORIAL MEDICAL CENTER OF WEST MICHIGAN
Family Medicine
922 LAWNDALE ST
LUDINGTON, MI 49431
Mason County (231) 845-7380

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 Timothy O Callaghan's NPI number?

The NPI number for Timothy O Callaghan is 1982604617. It was assigned to this individual provider in the NPPES registry on July 22, 2005.

Where is Timothy O Callaghan located?

Timothy O Callaghan practices at 922 Lawndale St, Ludington, MI 49431. The listed phone number is (231) 845-7380.

What is Timothy O Callaghan's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Timothy O Callaghan enrolled in Medicare?

Yes. Timothy O Callaghan is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Timothy O Callaghan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Timothy O Callaghan reassigns Medicare benefits to Spectrum Health Primary Care Partners (Muskegon, MI). The 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 Timothy O Callaghan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Timothy O Callaghan was last updated on September 5, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.