JOHN HAROLD HAMMETT
NPI 1982809687
Nurse Anesthetist, Certified Registered in Jackson, MS
About John Harold Hammett NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN HAROLD HAMMETT (NPI 1982809687) is an individual nurse anesthetist, certified registered in Jackson, Mississippi, licensed in Mississippi (R860386) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS, is affiliated with University Of Mississippi Med Center, and is a graduate of Other (2006).
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
John Harold Hammett 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
11Medicare enrollment records show John Hammett reassigns Medicare billing to 11 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Jackson, MS 39216
- Reassigned Medicare billing, Mississippi enrollment
- 1,932 clinicians in this Medicare group
Jackson, MS 39202
- Reassigned Medicare billing, Mississippi enrollment
- Medicare enrollment name: Medical Foundation Of Central Mississippi Inc
- 423 clinicians in this Medicare group
Jackson, MS 39216
- Reassigned Medicare billing, Mississippi enrollment
- 86 clinicians in this Medicare group
Jackson, MS 39201
- Reassigned Medicare billing, Mississippi enrollment
- 187 clinicians in this Medicare group
Jackson, MS 39208
- Reassigned Medicare billing, Mississippi enrollment
- 154 clinicians in this Medicare group
Morton, MS 39117
- Reassigned Medicare billing, Mississippi enrollment
- Also billed through NPI 1306909734 (Mississippi)
- 94 clinicians in this Medicare group
Laurel, MS 39440
- Reassigned Medicare billing, Mississippi enrollment
- 14 clinicians in this Medicare group
Indianola, MS 38751
- Reassigned Medicare billing, Mississippi enrollment
- 89 clinicians in this Medicare group
Hattiesburg, MS 39402
- Reassigned Medicare billing, Mississippi enrollment
- 17 clinicians in this Medicare group
Natchez, MS 39120
- Reassigned Medicare billing, Mississippi enrollment
- 63 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.
University Of Mississippi Med Center
Acute Care Hospitals · Jackson, MSSt Dominic-Jackson Memorial Hospital
Acute Care Hospitals · Jackson, MSPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 39216 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.
JACKSON, MS 39216
JACKSON, MS 39216
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 Hammett's NPI number?
The NPI number for John Hammett is 1982809687. It was assigned to this individual provider in the NPPES registry on June 20, 2007.
Where is John Hammett located?
John Hammett practices at 2500 N State St, Jackson, MS 39216. The listed phone number is (601) 984-1000.
What is John Hammett's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is John Hammett enrolled in Medicare?
Yes. John Hammett 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 Hammett's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Hammett reassigns Medicare benefits to 11 organizations: State Of Mississippi - University Of Mississippi Medical Center (Jackson, MS), Baptist Jackson Heart Cardiology Clinic-Magee (Jackson, MS), Physicians Anesthesia Group, P.A. (Jackson, MS), Perioperative Services Of Mississippi, LLC (Jackson, MS), Anesthesia Consultants PA (Jackson, MS) and 6 more organizations, listed in the Medicare section above. 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 Hammett's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Hammett accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 1 other insurer list John Hammett 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 Hammett affiliated with any hospitals?
According to CMS data, John Hammett is affiliated with University Of Mississippi Med Center and St Dominic-Jackson Memorial Hospital.
When was this NPI record last updated?
The NPPES record for John Hammett was last updated on December 22, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# John Harold Hammett · NPI 1982809687
Nurse Anesthetist, Certified Registered physician in Jackson, Mississippi. Individual provider, active in the CMS NPPES registry since June 20, 2007.
## Identity
- **NPI:** 1982809687 (Entity type: Individual)
- **Enumerated:** June 20, 2007
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** R860386 (Mississippi)
- **Sole proprietor:** No
## Practice location
- **Address:** 2500 N STATE ST, Jackson, MS 39216-4500
- **Phone:** (601) 984-1000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging
- **Bills Medicare through:** 11 organizations under Medicare reassignment (form CMS-855R): State Of Mississippi - University Of Mississippi Medical Center (NPI 1154317527, Jackson, MS); Baptist Jackson Heart Cardiology Clinic-Magee (NPI 1902178346, Jackson, MS); Physicians Anesthesia Group, P.A. (NPI 1407890783, Jackson, MS); Perioperative Services Of Mississippi, LLC (NPI 1881123123, Jackson, MS); Anesthesia Consultants PA (NPI 1750300836, Jackson, MS); and 6 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2006
## Record status
- **NPPES last updated:** December 22, 2010
- **Other identifiers:** Medicare PIN 302I438779 (MS)
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Source: [NPI Profile](https://npiprofile.com/npi/1982809687) · Data from the CMS NPPES public registry.