DR. MICHAEL SLOAN MACKELVIE D.O.
NPI 1154748119
Obstetrics & Gynecology in Houston, TX
About Dr. Michael Sloan Mackelvie D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL SLOAN MACKELVIE D.O. (NPI 1154748119) is an individual obstetrics & gynecology provider in Houston, Texas, licensed in Texas (R6615) and active in the NPI registry since March 2014. He is enrolled in Medicare PECOS, maintains a secondary practice location in The Woodlands, and is a graduate of Other (2014).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 3
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. Michael Sloan Mackelvie 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
2Medicare enrollment records show Michael Mackelvie reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Houston, TX 77025
- Reassigned Medicare billing, Texas enrollment
- 1,649 clinicians in this Medicare group
Austin, TX 78758
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: Obhg Texas Holdings PA
- 998 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 77014 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.
HOUSTON, TX 77014
HOUSTON, TX 77014
HOUSTON, TX 77014
HOUSTON, TX 77014
HOUSTON, TX 77014
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 Michael Mackelvie's NPI number?
The NPI number for Michael Mackelvie is 1154748119. It was assigned to this individual provider in the NPPES registry on March 27, 2014.
Where is Michael Mackelvie located?
Michael Mackelvie practices at 15655 Cypress Wood Medical Dr Ste 100, Houston, TX 77014. The listed phone number is (713) 442-1700.
What is Michael Mackelvie's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Michael Mackelvie enrolled in Medicare?
Yes. Michael Mackelvie 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 Michael Mackelvie's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Mackelvie reassigns Medicare benefits to 2 organizations: Kelsey-Seybold Medical Group, PLLC (Houston, TX) and Obhg Texas Holdings, P.A. (Austin, TX). 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 Michael Mackelvie's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Mackelvie accept?
Health plans from Blue Cross and Blue Shield of Texas and UnitedHealthcare list Michael Mackelvie 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.
When was this NPI record last updated?
The NPPES record for Michael Mackelvie was last updated on June 11, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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. Michael Sloan Mackelvie, D.O. · NPI 1154748119
Obstetrics & Gynecology physician in Houston, Texas. Individual provider, active in the CMS NPPES registry since March 27, 2014.
## Identity
- **NPI:** 1154748119 (Entity type: Individual)
- **Enumerated:** March 27, 2014
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** R6615 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 15655 CYPRESS WOOD MEDICAL DR STE 100, Houston, TX 77014-1487
- **Phone:** (713) 442-1700
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Kelsey-Seybold Medical Group, PLLC (NPI 1013915255, Houston, TX); Obhg Texas Holdings, P.A. (NPI 1083917769, Austin, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2014
## Record status
- **NPPES last updated:** June 11, 2021
- **Other identifiers:** Medicaid 389401602 (TX); Medicaid 389401601 (TX); Medicaid 389401603 (TX)
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Source: [NPI Profile](https://npiprofile.com/npi/1154748119) · Data from the CMS NPPES public registry.