Tammy Michelle Williams , PA-C
Physician Assistant • Idabel, OK
601 Se Washington St
Idabel, OK 747453319
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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Tammy Williams is listed in NPPES under Physician Assistant.
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NPI assigned on February 9, 2006; this date does not establish years in practice.
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Published CMS data list 32 Original Medicare Part B services in 2022.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022. Published rows only; this is not a quality measure.
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Published Part B service records, 2022:
- 71046 — X-ray of chest, 2 views: 17 service units.
- 93005 — Routine electrocardiogram (ecg) using at least 12 leads with tracing: 15 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2021 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2022). CPT notice
See the full table · Guide: How to read Medicare Part B data
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Published CMS data list 7,225 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Atorvastatin Calcium — 302 prescription fills, including refills.
- Levothyroxine Sodium — 275 prescription fills, including refills.
- Amlodipine Besylate — 263 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 139 records in the table · Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 95% of clinicians listed under Physician Assistant in Oklahoma (2024, 938 clinicians with data). Median for this group: 239. Middle half: 62 to 934.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 217 in 2018 to 32 in 2022.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2018–2022.
Practice Location & Contact Primary Location
601 Se Washington St
Idabel, OK 747453319
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 2 distinct additional practice-address records in Atoka, OK; Tishomingo, OK. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Kiamichi Family Medical Center Inc.. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2002
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $535 in 2022
The total amount Medicare approved for these services in 2022. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022.
Paid by Medicare
About $368 in 2022
The part of the Medicare-allowed amount that Medicare itself paid in 2022, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022.
30-day fills
14,214 standardized 30-day fills in 2024
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
$658,995 in 2024
The total cost of these prescriptions in 2024, 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 – by Provider and Drug, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $28.59 in 2025
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2025.
Years since graduation
24 years (graduated 2002)
CMS Doctors and Clinicians data list 2002 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
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.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
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; Medicare.gov, “Does your provider accept Medicare as full payment?”
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.
Enrolled in Medicare (PECOS)
Tammy Williams has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Tammy Williams as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Idabel and Oklahoma
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 95% of clinicians listed under Physician Assistant in Oklahoma (2024, 938 clinicians with data). Median for this group: 239. Middle half: 62 to 934.
Too few clinicians listed under Physician Assistant in Idabel have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 90% of clinicians listed under Physician Assistant in Oklahoma (2024, 938 clinicians with data). Median for this group: $5,092. Middle half: $598 to $115,221.
Too few clinicians listed under Physician Assistant in Idabel have Medicare Part D data for 2024 to compare.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Tammy Williams are from 2022.
3 active clinicians are listed under Physician Assistant with a practice address in Idabel, OK (1,870 in Oklahoma).
Addresses are self-reported to NPPES and may be out of date.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 85% from 217 in 2018 to 32 in 2022.
- 2018: 217
- 2019: 37
- 2020: 36
- 2021: 230
- 2022: 32
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Medicare-allowed amount
Medicare-allowed amount went from $632 in 2018 to $535 in 2022.
- 2018: $632
- 2019: $559
- 2020: $677
- 2021: $6,554
- 2022: $535
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Paid by Medicare
Paid by Medicare went from $632 in 2018 to $368 in 2022.
- 2018: $632
- 2019: $349
- 2020: $364
- 2021: $6,290
- 2022: $368
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 11% from 6,538 in 2020 to 7,225 in 2024.
- 2020: 6,538
- 2021: 5,991
- 2022: 6,599
- 2023: 6,551
- 2024: 7,225
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30-day fills
30-day fills increased 17% from 12,175 in 2020 to 14,214 in 2024.
- 2020: 12,175
- 2021: 11,704
- 2022: 13,467
- 2023: 13,303
- 2024: 14,214
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Part D drug cost
Part D drug cost increased 68% from $391,307 in 2020 to $658,995 in 2024.
- 2020: $391,307
- 2021: $393,614
- 2022: $578,887
- 2023: $623,121
- 2024: $658,995
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $84.40 in 2021 to $28.59 in 2025.
- 2021: $84.40
- 2022: $78.75
- 2023: $33.54
- 2024: $45.09
- 2025: $28.59
Sources: CMS Medicare Physician & Other Practitioners (2022), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $28.59.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
VRAYLAR | General | $28.59 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2021 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2022; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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71046
X-ray of chest, 2 views
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17 | 17 | $75.00 | $26.65 |
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93005
Routine electrocardiogram (ecg) using at least 12 leads with tracing
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15 | 14 | $50.00 | $5.47 |
Source: CMS Part B by Provider and Service, 2022; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 302 | 25,084 | $2,669.45 | 91 |
| Levothyroxine Sodium | Levothyroxine Sodium | 275 | 20,652 | $2,165.95 | 67 |
| Amlodipine Besylate | Amlodipine Besylate | 263 | 19,935 | $1,357.67 | 75 |
| Lisinopril | Lisinopril | 243 | 18,310 | $1,383.78 | 66 |
| Gabapentin | Gabapentin | 201 | 9,504 | $2,727.78 | 52 |
| Pantoprazole Sodium | Pantoprazole Sodium | 181 | 9,865 | $1,644.93 | 42 |
| Carvedilol | Carvedilol | 163 | 10,410 | $957.99 | 39 |
| Losartan Potassium | Losartan Potassium | 155 | 12,303 | $1,519.59 | 45 |
| Potassium Chloride | Potassium Chloride | 152 | 7,324 | $1,745.01 | 38 |
| Metoprolol Succinate | Metoprolol Succinate | 149 | 10,150 | $1,980.29 | 36 |
| Omeprazole | Omeprazole | 147 | 10,448 | $2,498.64 | 40 |
| Hydrochlorothiazide | Hydrochlorothiazide | 146 | 11,190 | $621.84 | 45 |
| Furosemide | Furosemide | 145 | 7,398 | $652.70 | 41 |
| Metformin Hcl | Metformin Hcl | 143 | 11,635 | $980.10 | 44 |
| Ozempic | Semaglutide | 142 | 4,586 | $142,340.59 | 22 |
| Meloxicam | Meloxicam | 139 | 9,214 | $1,080.72 | 38 |
| Fluticasone Propionate | Fluticasone Propionate | 136 | 5,710 | $1,424.38 | 68 |
| Simvastatin | Simvastatin | 120 | 10,140 | $769.13 | 34 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 115 | 3,899 | $2,901.73 | 32 |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 108 | 3,969 | $968.92 | 29 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 105 | 8,250 | $1,579.35 | 31 |
| Tramadol Hcl | Tramadol Hcl | 102 | 2,276 | $779.67 | 29 |
| Pregabalin | Pregabalin | 99 | 2,970 | $1,628.06 | 16 |
| Tamsulosin Hcl | Tamsulosin Hcl | 86 | 4,900 | $850.93 | 21 |
| Clopidogrel | Clopidogrel Bisulfate | 84 | 5,400 | $1,037.01 | 23 |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2026-05-06NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20080912000432
OK
2365464690
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Kiamichi Family Medical Center Inc.
6026 Battiest Pickens Rd, Broken Bow, OK 747285033
Phone: 5802866688149
Kiamichi Family Medical Center Inc.
403 S Indian Rd, Idabel, OK 747455458
Phone: 5802866688140
Kiamichi Family Medical Center Inc.
2809 Ne Lincoln Rd, Idabel, OK 747452421
Secondary Practice Locations
457 S Mississippi Ave
Atoka, OK 745252500
Phone: 5808894746
610 E 24th St
Tishomingo, OK 734603245
Phone: 5803712343
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant
Physician Assistant (Certified)
Physician Assistant
Physician Assistant (Certified)
Family Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Advanced Practice Registered Nurse - Certified Nurse Practitioner
Nurse Practitioner
Advanced Practice Registered Nurse
Family Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 601 E WASHINGTON ST, IDABEL, OK 747453319 (Tel: 5802866688)
Recorded as TAMMY WILLIAMS, PA-C
NPI status registered as active in NPPES database
Registered at 601 SE WASHINGTON ST, IDABEL, OK 747453319 (Tel: 5802866688)
Registered at 601 SE WASHINGTON ST, IDABEL, OK 747453319 (Tel: 5802866688)
Recorded as TAMMY WILLIAMS, P.A.-C
Physician Assistant (license number reported to NPPES: OK PA 1240)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Mailing Address
601 E Washington St
Idabel, OK 747453319
Phone: 5802866688