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MARK EDWARD NICHOLS M.D.
NPI 1891780227
Obstetrics & Gynecology in Conroe, TX

Active since September 12, 2005PECOS Enrolled
605 S CONROE MEDICAL DR, CONROE, TX 77304(936) 539-4004(936) 539-3635 Get Directions Write a Review

NPPES record last updated: March 7, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 7, 2023, May 13, 2021, Feb 7, 2017 (3 updates tracked since 2017).

About Mark Edward Nichols M.d. NPPES

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

MARK EDWARD NICHOLS M.D. (NPI 1891780227) is an individual obstetrics & gynecology provider in Conroe, Texas, licensed in Texas (L0457) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1891780227
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameMARK EDWARD NICHOLSCredential: M.D.
Location Address605 S CONROE MEDICAL DRConroe, TX 77304-4722
Mailing Address605 S Conroe Medical DrConroe, TX 77304-4722 · (936) 539-4004 · Fax (936) 539-3635
Phone(936) 539-4004
Fax(936) 539-3635
Sole ProprietorNo
Enumeration DateSeptember 12, 2005
Last NPPES UpdateMarch 7, 20233 updates tracked since enumeration
NPPES CertifiedMay 13, 2021
✔ NPI 1891780227 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in TX · L0457
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
605 S CONROE MEDICAL DR, Conroe, TX 77304
Open in Google Maps ↗

Other Identifiers 1

Medicaid1560377-03TX

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan, Community First.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark Edward Nichols M.d. 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 Reassignments

3

Medicare enrollment records show Mark Nichols reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Obhg Texas Holdings, P.A.
134 mi
Obstetrics & Gynecology
12221 N MOPAC EXPY
Austin, TX 78758
  • Reassigned Medicare billing, Texas enrollment
  • Medicare enrollment name: Obhg Texas Holdings PA
  • 998 clinicians in this Medicare group
NPI 1083917769 (800) 967-2289
Westover Hills Women's Health PA
196 mi
Obstetrics & Gynecology
7430 BARLITE BLVD STE 105
San Antonio, TX 78224
  • Reassigned Medicare billing, Texas enrollment
  • 31 clinicians in this Medicare group
NPI 1477765824 (210) 922-2727
Bsz Medical, P.A.
204 mi
Family Medicine
1746 W GOODWIN ST
Pleasanton, TX 78064
  • Reassigned Medicare billing, Texas enrollment
  • Medicare enrollment name: Bsz Medical PA
  • 19 clinicians in this Medicare group
NPI 1285934075 (830) 268-5040

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 77304 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
$126.40 typical visit price
range $54.84 – $166.88
Typical copayment $31.60 (range $13.71 – $41.72)
Most-billed visit code 99204
Established Patient
$68.55 typical visit price
range $17.52 – $136.11
Typical copayment $17.13 (range $4.38 – $34.02)
Most-billed visit code 99213
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 20

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

RUSHAB HARSHADKUMAR PATEL MD
Hospitalist
605 S CONROE MEDICAL DR
CONROE, TX 77304
Montgomery County (936) 539-4004
SERGIO JASAEL GUTIERREZ MD
Student in an Organized Health Care Education/Training Program
605 S CONROE MEDICAL DR
CONROE, TX 77304
Montgomery County (936) 539-4004
CHANDANA CHITTURI MD
Family Medicine
605 S CONROE MEDICAL DR
CONROE, TX 77304
Montgomery County (936) 539-4004
AMANDA CHAU DO
Family Medicine
605 S CONROE MEDICAL DR
CONROE, TX 77304
Montgomery County (936) 539-4004
ADONAI NATALIA PAZ MD
Student in an Organized Health Care Education/Training Program
605 S CONROE MEDICAL DR
CONROE, TX 77304
Montgomery County (936) 539-4004
NICOLAS ALONSO DO
Student in an Organized Health Care Education/Training Program
605 S CONROE MEDICAL DR
CONROE, TX 77304
Montgomery County (936) 539-4004
JORGE CEA LPC
Counselor (Professional)
605 S CONROE MEDICAL DR
CONROE, TX 77304
Montgomery County (936) 539-4004
DANNY FARLEY M.D.
Family Medicine
605 S CONROE MEDICAL DR
CONROE, TX 77304
Montgomery County (936) 539-4004

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 Mark Nichols's NPI number?

The NPI number for Mark Nichols is 1891780227. It was assigned to this individual provider in the NPPES registry on September 12, 2005.

Where is Mark Nichols located?

Mark Nichols practices at 605 S Conroe Medical Dr, Conroe, TX 77304. The listed phone number is (936) 539-4004.

What is Mark Nichols's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Mark Nichols enrolled in Medicare?

Yes. Mark Nichols is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mark Nichols's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Nichols reassigns Medicare benefits to 3 organizations: Obhg Texas Holdings, P.A. (Austin, TX), Westover Hills Women's Health PA (San Antonio, TX) and Bsz Medical, P.A. (Pleasanton, 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 Mark Nichols's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Nichols accept?

Health plans from Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan and Community First list Mark Nichols 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 Mark Nichols was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.