DR. JOHN HAROLD MONTGOMERY D.O.
NPI 1821027368
Psychiatry & Neurology - Psychiatry in Pascagoula, MS
About Dr. John Harold Montgomery D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN HAROLD MONTGOMERY D.O. (NPI 1821027368) is an individual psychiatry provider in Pascagoula, Mississippi, licensed in Mississippi (18132) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Singing River Health System, and is a graduate of Nova Southeastern College Of Osteo Medicine (1998).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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. John Harold Montgomery 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
4Medicare enrollment records show John Montgomery reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Pascagoula, MS 39581
- Reassigned Medicare billing, Mississippi enrollment
- 450 clinicians in this Medicare group
Pascagoula, MS 39581
- Reassigned Medicare billing, Mississippi enrollment
- 5 clinicians in this Medicare group
Gulfport, MS 39503
- Reassigned Medicare billing, Mississippi enrollment
- 298 clinicians in this Medicare group
Oxford, MS 38655
- Reassigned Medicare billing, Mississippi enrollment
- 60 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 8
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.
Singing River Health System
Acute Care Hospitals · Pascagoula, MSSinging River Gulfport
Acute Care Hospitals · Gulfport, MSPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 39581 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 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PASCAGOULA, MS 39581
PASCAGOULA, MS 39581
PASCAGOULA, MS 39581
PASCAGOULA, MS 39581
PASCAGOULA, MS 39581
PASCAGOULA, MS 39581
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 John Montgomery's NPI number?
The NPI number for John Montgomery is 1821027368. It was assigned to this individual provider in the NPPES registry on June 30, 2006.
Where is John Montgomery located?
John Montgomery practices at 4502 Lt Eugene J Majure Dr, Pascagoula, MS 39581. The listed phone number is (228) 696-9224.
What is John Montgomery's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is John Montgomery enrolled in Medicare?
Yes. John Montgomery 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 John Montgomery's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Montgomery reassigns Medicare benefits to 4 organizations: Singing River Health System (Pascagoula, MS), South Mississippi Mental Health Center (Pascagoula, MS), Singing River Gulfport (Gulfport, MS) and Right Track Medical Group, Inc (Oxford, MS). 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 John Montgomery's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Montgomery accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 5 other insurers list John Montgomery 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 John Montgomery affiliated with any hospitals?
According to CMS data, John Montgomery is affiliated with Singing River Health System and Singing River Gulfport.
When was this NPI record last updated?
The NPPES record for John Montgomery was last updated on March 11, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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. John Harold Montgomery, D.O. · NPI 1821027368
Psychiatry physician in Pascagoula, Mississippi. Individual provider, active in the CMS NPPES registry since June 30, 2006.
## Identity
- **NPI:** 1821027368 (Entity type: Individual)
- **Enumerated:** June 30, 2006
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** 18132 (Mississippi)
- **Sole proprietor:** No
## Practice location
- **Address:** 4502 LT EUGENE J MAJURE DR, Pascagoula, MS 39581-5305
- **Phone:** (228) 696-9224 · **Fax:** (228) 696-9228
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Singing River Health System (NPI 1124136593, Pascagoula, MS); South Mississippi Mental Health Center (NPI 1699564419, Pascagoula, MS); Singing River Gulfport (NPI 1861010159, Gulfport, MS); Right Track Medical Group, Inc (NPI 1972080257, Oxford, MS) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Nova Southeastern College Of Osteo Medicine, class of 1998
## Record status
- **NPPES last updated:** March 11, 2020
- **Other identifiers:** Medicaid 03707333 (MS)
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Source: [NPI Profile](https://npiprofile.com/npi/1821027368) · Data from the CMS NPPES public registry.