JOHN PRESTON M.D.
NPI 1134129190
Anesthesiology in Glen Burnie, MD
About John Preston M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN PRESTON M.D. (NPI 1134129190) is an individual anesthesiology provider in Glen Burnie, Maryland, licensed in Maryland (D0058442) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
John Preston M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
8Medicare enrollment records show John Preston reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Glen Burnie, MD 21061
- Reassigned Medicare billing, Maryland enrollment
- 29 clinicians in this Medicare group
Glen Burnie, MD 21061
- Reassigned Medicare billing, Maryland enrollment
- 24 clinicians in this Medicare group
Annapolis, MD 21401
- Reassigned Medicare billing, Maryland enrollment
- 44 clinicians in this Medicare group
Annapolis, MD 21401
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 391 clinicians in this Medicare group
Columbia, MD 21045
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 86 clinicians in this Medicare group
Rockville, MD 20850
- Reassigned Medicare billing, District of Columbia enrollment
- 54 clinicians in this Medicare group
Rockville, MD 20850
- Reassigned Medicare billing, District of Columbia enrollment
- 46 clinicians in this Medicare group
Bel Air, MD 21014
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 38 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 12
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.
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.
GLEN BURNIE, MD 21061
GLEN BURNIE, MD 21061
GLEN BURNIE, MD 21061
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 Preston's NPI number?
The NPI number for John Preston is 1134129190. It was assigned to this individual provider in the NPPES registry on July 29, 2005.
Where is John Preston located?
John Preston practices at 301 Hospital Dr, Glen Burnie, MD 21061. The listed phone number is (410) 787-4000.
What is John Preston's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is John Preston enrolled in Medicare?
Yes. John Preston is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for John Preston's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Preston reassigns Medicare benefits to 8 organizations: Francu One LLC (Glen Burnie, MD), Mukul Khandelwal, PA (Glen Burnie, MD), Bestgate Anesthesia LLC (Annapolis, MD), Anesthesia Company, LLC (Annapolis, MD), Columbia Outpatient Sedation LLC (Columbia, MD) and 3 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 Preston'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 John Preston was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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 Preston, M.D. · NPI 1134129190
Anesthesiology physician in Glen Burnie, Maryland. Individual provider, active in the CMS NPPES registry since July 29, 2005.
## Identity
- **NPI:** 1134129190 (Entity type: Individual)
- **Enumerated:** July 29, 2005
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** D0058442 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 301 HOSPITAL DR, Glen Burnie, MD 21061-5803
- **Phone:** (410) 787-4000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 8 organizations under Medicare reassignment (form CMS-855R): Francu One LLC (NPI 1194972588, Glen Burnie, MD); Mukul Khandelwal, PA (NPI 1316969256, Glen Burnie, MD); Bestgate Anesthesia LLC (NPI 1568889327, Annapolis, MD); Anesthesia Company, LLC (NPI 1871548156, Annapolis, MD); Columbia Outpatient Sedation LLC (NPI 1588921225, Columbia, MD); and 3 more · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 13, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1134129190) · Data from the CMS NPPES public registry.