Dr. Mark M Williams , MD
Orthopaedic Surgery β’ Fresno, CA
8221 N Fresno St
Fresno, CA 937202041
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Mark Williams is listed in NPPES under Orthopaedic Surgery.
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NPI assigned on July 12, 2006; this date does not establish years in practice.
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Published CMS data list 41 Medicare Part D prescriptions, including refills, in 2015.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2015. Published rows only; this is not a quality measure.
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Published Part D records, 2015:
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) β 27 prescription fills, including refills.
- Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) β 14 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2015. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table Β· Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 58 in 2013 to 41 in 2015.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2013β2015.
Practice Location & Contact Primary Location
8221 N Fresno St
Fresno, CA 937202041
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Orthopaedic Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
41 standardized 30-day fills in 2015
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$665 in 2015
The total cost of these prescriptions in 2015, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2015.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019β2025.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.
Compared with the same specialty in Fresno and California
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Williams are from 2015.
43 active clinicians are listed under Orthopaedic Surgery with a practice address in Fresno, CA (2,261 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Fresno
16.3% of these 43 clinicians have the CMS telehealth indicator.
53.5% of these 43 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 29% from 58 in 2013 to 41 in 2015.
- 2013: 58
- 2014: 68
- 2015: 41
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30-day fills
30-day fills decreased 29% from 58 in 2013 to 41 in 2015.
- 2013: 58
- 2014: 68
- 2015: 41
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Part D drug cost
Part D drug cost went from $826 in 2013 to $665 in 2015.
- 2013: $826
- 2014: $583
- 2015: $665
Sources: CMS Medicare Part D Prescribers (2015), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2015.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 27 | 313 | $441.18 | 20 |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 14 | 113 | $224.31 | 13 |
Source: CMS Part D by Provider and Drug, 2015; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2026-02-26NUCC Taxonomy Code: 207X00000X
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
NUCC Taxonomy Code: 207XX0005X
An orthopaedic surgeon trained in sports medicine provides appropriate care for all structures of the musculoskeletal system directly affected by participation in sporting activity. This specialist is proficient in areas including conditioning, training and fitness, athletic performance and the impact of dietary supplements, pharmaceuticals, and nutrition on performance and health, coordination of care within the team setting utilizing other health care professionals, field evaluation and management, soft tissue biomechanics and injury healing and repair. Knowledge and understanding of the principles and techniques of rehabilitation, athletic equipment and orthotic devices enables the specialist to prevent and manage athletic injuries.
Additional State Medicaid & Healthcare Payer Identifiers
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 8221 N FRESNO ST, FRESNO, CA 937202041 (Tel: 5592222294)
Registered at 21C ORINDA WAY # 367, ORINDA, CA 945632534 (Tel: 8503811010)
Orthopaedic Surgery (license number reported to NPPES: CA G73670)
Registered at 2202 COUNTRY CLUB DR, LYNN HAVEN, FL 324441992 (Tel: 8507692757)
NPI status registered as active in NPPES database
Registered at 2202 COUNTRY CLUB DR, LYNN HAVEN, FL 324441992 (Tel: 8507692757)
Registered at 320 EAST NINETEENTH STREET, PANAMA CITY, FL 324054718 (Tel: 8507692757)
Recorded as MARK WILLIAMS, MD
Specialist (license number reported to NPPES: FL ME0057987)
NPI status registered as active in NPPES database
Registered at 320 EAST NINETEENTH STREET, PANAMA CITY, FL 324054718 (Tel: 8507692757)
Registered at 320 EAST NINETEENTH STREET, PANAMA CITY, FL 324054718 (Tel: 8507692757)
Recorded as MARK WILLIAMS, MD
Specialist (license number reported to NPPES: FL ME0057987)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Orthopaedic Surgery Specialists in Fresno
- Dr. Julia Lee, MD
- Dr. Matthew Simons, MD
- Dr. Devin Mangold, MD
- Dr. Jerome Dunklin, MD
- Dr. Alok Gaur, MD
- Dr. Zachary Hill, MD
Mailing Address
21c Orinda Way # 367
Orinda, CA 945632534
Phone: 8503811010