Mark Johnston Williams, M.D.
Anesthesiology Physician · Longview, TX
Mark Johnston Williams, M.D. is an anesthesiology physician with a practice address in Longview, Texas, and NPI 1174590947, issued on Mar 1, 2006. Check the license (Texas H3845, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark Johnston Williams
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- H3845 TX
Self-reported in NPPES; status is on the state search - Practice location
- 2901 N. 4TH St., Longview, TX 75605
- Phone
- (903) 247-2050
- Enumerated
- Mar 1, 2006
- Record last updated
- Jan 31, 2023
- Fax
- (903) 934-8280
- Medicaid ID
- 138869601 TX
- Medicare enrollment
- Enrolled (PECOS I20050805000755); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 4,635 in Texas → Look up another NPI →
Also registered at 2901 N. 4TH St.
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jimmy Chamness, M.D.Anesthesiology Physician1801863709
Verify Mark Johnston Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license H3845Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 93.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $16.72
1 payment: food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 17,774 providers of this specialty with any payment received $669.59 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Northstar Anesthesia III PALongview, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Johnston Williams among 4,635 anesthesiology physician records in Texas
Mark Johnston Williams, M.D. is one of 4,635 anesthesiology physician records with a practice address in Texas. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 54% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1986 · median 2005 among the 3,293 with a school on file
- Record last updated2023 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anesthesiology Physician providers in Texas
There are 4,635 anesthesiology physician records in Texas.
All 4,635 in Texas → Every provider in Longview → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Roger Baker, MDLongview, TX 756051033408364
- Jimmy Chamness, M.D.Longview, TX 756051801863709
- Laura Martin, M.D.Longview, TX 756051386611044
- Jeremy Schirmer, MDLongview, TX 756051558572073
- Stanley Tunstall, M.D.Longview, TX 756051124239181
- Benjie Burke, MDLongview, TX 756011306885900
- Matthew Hermansen, D.O., PHARMDLongview, TX 756011437418324
- Steven Hough, MDLongview, TX 756011487693008
Common questions
What is Mark Johnston Williams, M.D.'s NPI number?
Mark Johnston Williams, M.D.'s National Provider Identifier (NPI) is 1174590947, issued on Mar 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Johnston Williams, M.D. located?
The NPPES record lists a practice address at 2901 N. 4TH St., Longview, TX, 75605. Phone: (903) 247-2050. Providers update this record themselves, so call before visiting.
How can I verify Mark Johnston Williams, M.D.'s license?
NPPES lists Texas license number H3845, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Mark Johnston Williams, M.D.'s MIPS final score?
The 2023 MIPS final score is 93.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.