Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Dr. John Wang , MD

Internal Medicine โ€ข Austin, TX

Active NPI 1659639607 Individual Practitioner Male Practitioner Accepts Medicare assignment Telehealth (some services)
Practice location in NPPES

12221 N Mopac Expy
Austin, TX 78758

Call 5129014009 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

12221 N Mopac Expy

Austin, TX 78758

Telephone 5129014009
Fax 5129013909
Organization at the Same NPPES Address or Phone
Austin Pathology Associates Facility NPI 1669414330

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

CMS Doctors and Clinicians lists 2 distinct group names: Legacy Healthcare Services Inc; The Austin Diagnostic Clinic Pllc. 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

Medical School

Tulane University School Of Medicine

Graduation Year

2012

Medicare patients

494 people with Original Medicare in 2024

Different Original Medicare patients in 2024; counts below 11 are hidden; this does not show availability or quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider, 2024.

Medicare-allowed amount

About $221,013 in 2024

The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.

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 โ€“ by Provider and Service, 2024.

Paid by Medicare

About $180,650 in 2024

The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.

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 โ€“ by Provider and Service, 2024.

30-day fills

20,560 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

$734,603 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

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 โ€“ by Provider and Drug, 2024.

Open Payments general payments, program year 2025

All general payments: $811.89 across 38 records.

By nature of payment

  • Food and Beverage: $811.89 across 38 records.

Reporting-company totals (3 largest of 18)

  • Exact Sciences Corporation: $111.01 across 5 records.
  • Novo Nordisk Inc: $110.51 across 5 records.
  • Pfizer Inc.: $105.01 across 4 records.

A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.

See the full table

Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).

Guide: How to read an Open Payments record

Years since graduation

14 years (graduated 2012)

CMS Doctors and Clinicians data list 2012 as the year this clinician finished professional 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

2012

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.

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, โ€œDoes your provider accept Medicare as full payment?โ€

Guide: What Medicare assignment means

Telehealth (some services)

Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.

What this does not show: Telehealth (some services)

It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Wang 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.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Wang 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.

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.

Guide: What ordering and referring status means

Compared with the same specialty in Austin and Texas

Billing and prescribing volume is not a quality rating.

Medicare Part B services

More Medicare Part B services than 95% of clinicians listed under Internal Medicine in Austin, TX (2024, 269 clinicians with data). Median for this group: 578. Middle half: 242 to 1,086.

More Medicare Part B services than 95% of clinicians listed under Internal Medicine in Texas (2024, 5,423 clinicians with data). Median for this group: 645. Middle half: 277 to 1,322.

Medicare-allowed amount

A higher Medicare-allowed amount than 95% of clinicians listed under Internal Medicine in Austin, TX (2024, 269 clinicians with data). Median for this group: $60,949. Middle half: $26,085 to $98,273.

A higher Medicare-allowed amount than 90% of clinicians listed under Internal Medicine in Texas (2024, 5,423 clinicians with data). Median for this group: $61,221. Middle half: $27,420 to $115,826.

Paid by Medicare

A higher Medicare payment amount than 95% of clinicians listed under Internal Medicine in Austin, TX (2024, 269 clinicians with data). Median for this group: $47,232. Middle half: $20,508 to $77,772.

A higher Medicare payment amount than 90% of clinicians listed under Internal Medicine in Texas (2024, 5,423 clinicians with data). Median for this group: $47,501. Middle half: $20,446 to $90,051.

Medicare Part D prescriptions

More Part D prescriptions than 90% of clinicians listed under Internal Medicine in Austin, TX (2024, 299 clinicians with data). Median for this group: 278. Middle half: 56 to 2,862.

More Part D prescriptions than 85% of clinicians listed under Internal Medicine in Texas (2024, 5,674 clinicians with data). Median for this group: 828. Middle half: 121 to 4,824.

Part D drug cost

A higher Part D drug cost than 95% of clinicians listed under Internal Medicine in Austin, TX (2024, 299 clinicians with data). Median for this group: $16,522. Middle half: $774 to $198,601.

A higher Part D drug cost than 85% of clinicians listed under Internal Medicine in Texas (2024, 5,674 clinicians with data). Median for this group: $64,859. Middle half: $4,211 to $436,775.

607 active clinicians are listed under Internal Medicine with a practice address in Austin, TX (9,191 in Texas).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Austin

16.5% of these 607 clinicians have the CMS telehealth indicator.

46.1% of these 607 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Physician & Other Practitioners (2024), 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 ยท 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

Open Payments ยท Program Year 2025
Disclosure Year:

Program year 2025 (payments made January 1 โ€“ December 31, 2025): 38 records totaling $811.89.

Manufacturer Payment Nature Product Type Amount ($)
Boston Scientific Corporation
Food and Beverage
In-kind items and services
CAPTIVATOR II General $31.34
Exact Sciences Corporation
Food and Beverage
In-kind items and services
Cologuard Collection Kit General $30.82
Boehringer Ingelheim Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
JARDIANCE General $28.78
Pfizer Inc.
Food and Beverage
In-kind items and services
VYNDAQEL General $28.71
Pfizer Inc.
Food and Beverage
In-kind items and services
VYNDAQEL General $28.46
Astellas Pharma US Inc
Food and Beverage
In-kind items and services
Veozah General $27.32
Novo Nordisk Inc
Food and Beverage
In-kind items and services
Ozempic General $25.97
Verona Pharma, Inc.
Food and Beverage
Cash or cash equivalent
Ohtuvayre General $25.88
Pacira Pharmaceuticals Incorporated
Food and Beverage
In-kind items and services
Exparel General $25.83
Pfizer Inc.
Food and Beverage
In-kind items and services
โ€” General $25.32
Daiichi Sankyo Inc.
Food and Beverage
In-kind items and services
INJECTAFER General $24.62
Exact Sciences Corporation
Food and Beverage
In-kind items and services
Cologuard Collection Kit General $23.22
Pfizer Inc.
Food and Beverage
In-kind items and services
PREVNAR 20 General $22.52
Astellas Pharma US Inc
Food and Beverage
In-kind items and services
Veozah General $21.80
Daiichi Sankyo Inc.
Food and Beverage
In-kind items and services
INJECTAFER General $21.77
Exact Sciences Corporation
Food and Beverage
In-kind items and services
Cologuard Collection Kit General $21.65
Novo Nordisk Inc
Food and Beverage
In-kind items and services
โ€” General $21.60
Novo Nordisk Inc
Food and Beverage
In-kind items and services
โ€” General $21.56
Exact Sciences Corporation
Food and Beverage
In-kind items and services
Cologuard Collection Kit General $21.52
GlaxoSmithKline, LLC.
Food and Beverage
In-kind items and services
SHINGRIX General $20.80
Novo Nordisk Inc
Food and Beverage
In-kind items and services
Wegovy General $20.73
Novo Nordisk Inc
Food and Beverage
In-kind items and services
โ€” General $20.65
Astellas Pharma US Inc
Food and Beverage
In-kind items and services
Veozah General $20.48
Biogen, Inc.
Food and Beverage
In-kind items and services
LEQEMBI General $19.79
Astellas Pharma US Inc
Food and Beverage
In-kind items and services
Veozah General $19.39

(top 25 shown)

Source: CMS Open Payments, program year 2025, released June 30, 2026.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2024.

CMS Part B ยท Data Year 2024
Reporting Year:

CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ€“2023 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 โ€“ by Provider and Service data, 2017โ€“2024; 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
J0897 Injection, denosumab, 1 mg
1,980 18 $49.82 $25.63
36415 Insertion of needle into vein for collection of blood sample
522 356 $9.00 $8.65
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
397 278 $224.77 $128.06
80053 Blood test, comprehensive group of blood chemicals
375 300 $41.85 $10.35
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count
353 304 $30.83 $7.61
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
350 263 $157.77 $91.24
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
327 327 $361.94 $128.69
81001 Manual urinalysis test with examination using microscope, automated
276 257 $13.10 $3.11
80061 Blood test, lipids (cholesterol and triglycerides)
252 247 $53.00 $13.12
84443 Blood test, thyroid stimulating hormone (tsh)
202 168 $64.76 $16.46
83036 Hemoglobin a1c level
164 123 $38.52 $9.52
84439 Thyroxine (thyroid chemical), free
111 80 $35.83 $8.84
82570 Creatinine level to test for kidney function or muscle injury
104 75 $20.67 $5.08
82043 Urine microalbumin (protein) level
100 72 $22.62 $5.66
G0103 Prostate cancer screening; prostate specific antigen test (psa)
98 98 $72.49 $18.92
82306 Vitamin d-3 level
53 51 $110.58 $29.01
90653 Influenza vaccine, inactivated
44 44 $158.00 $81.82
G0008 Administration of influenza virus vaccine
43 43 $63.49 $32.50
96372 Injection of drug or substance under skin or into muscle
36 19 $65.78 $14.50
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and
34 27 $165.56 $54.17
90471 Administration of vaccine
25 25 $66.00 $21.02
82728 Ferritin (blood protein) level
23 21 $53.57 $13.36
80048 Blood test, basic group of blood chemicals (calcium, total)
19 16 $34.42 $8.29
83540 Iron level
19 19 $25.47 $6.34
84153 Psa (prostate specific antigen) measurement, total
19 18 $71.05 $17.07

(top 25 shown)

Source: CMS Part B by Provider and Service, 2024; 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.

CMS Part D ยท Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Atorvastatin Calcium Atorvastatin Calcium 553 48,192 $4,098.51 175
Rosuvastatin Calcium Rosuvastatin Calcium 540 46,404 $5,683.04 179
Losartan Potassium Losartan Potassium 391 34,258 $4,113.69 122
Amlodipine Besylate Amlodipine Besylate 383 33,545 $2,481.52 126
Levothyroxine Sodium Levothyroxine Sodium 362 31,450 $5,850.49 116
Lisinopril Lisinopril 270 23,493 $1,951.78 85
Gabapentin Gabapentin 233 18,644 $3,994.76 97
Tamsulosin Hcl Tamsulosin Hcl 227 18,793 $3,562.80 74
Omeprazole Omeprazole 215 19,070 $2,625.08 92
Metformin Hcl Er Metformin Hcl 190 16,991 $2,111.72 65
Hydrochlorothiazide Hydrochlorothiazide 184 15,778 $919.43 55
Simvastatin Simvastatin 175 15,720 $1,859.59 52
Metoprolol Succinate Metoprolol Succinate 157 13,867 $2,074.49 51
Metformin Hcl Metformin Hcl 150 13,075 $1,352.48 48
Pantoprazole Sodium Pantoprazole Sodium 147 13,110 $2,516.14 51
Carvedilol Carvedilol 125 10,452 $793.15 41
Finasteride Finasteride 105 9,444 $1,567.27 41
Bupropion Xl Bupropion Hcl 104 8,880 $2,866.61 36
Glipizide Er Glipizide 100 8,340 $1,270.01 33
Ozempic Semaglutide 89 3,472 $102,884.05 13
Mounjaro Tirzepatide 86 2,762 $98,800.04 16
Sertraline Hcl Sertraline Hcl 84 6,537 $719.41 24
Montelukast Sodium Montelukast Sodium 83 6,630 $839.71 26
Alendronate Sodium Alendronate Sodium 82 6,364 $818.56 29
Allopurinol Allopurinol 78 6,441 $801.01 22

(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: 2023-11-14
Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

License # reported to NPPES TX R7139

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Internal Medicine

NUCC Taxonomy Code: 207R00000X

License # reported to NPPES CA 142039

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Texas Medical Board.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - INTERNAL MEDICINE

Medicare Enrollment ID

I20181206003366

Enrollment State Jurisdiction

TX

PECOS Control ID

9133343841

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

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

Legacy Healthcare Services Inc

3405 El Salido Pkwy, Cedar Park, TX 786135640

Phone: 5122702247

The Austin Diagnostic Clinic Pllc

12221 N Mopac Expy, Austin, TX 787582401

Phone: 5129012530

The Austin Diagnostic Clinic Pllc

12221 N Mopac Expy, Austin, TX 787582401

Phone: 5129012530

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

20 listed
NPI 1619123775

Doctor of Medicine (M.D.)

Dr. Yolanda Clay-Po , MD

Internal Medicine

NPI 1164405833

Doctor of Medicine (M.D.)

Nancy Dasso , FNP

Nurse Practitioner - Family

NPI 1245287150

Family Nurse Practitioner

Dr. Frederick Fung , MD

Internal Medicine

NPI 1275509291

Doctor of Medicine (M.D.)

Marissa Huntsman

Nurse Practitioner - Family

NPI 1366706921
Dr. William Lewis , DO

Internal Medicine

NPI 1265401350

Doctor of Osteopathic Medicine (D.O.)

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

8 Historical Events
๐Ÿ“
Updated Practice Location July 25, 2018

Registered at 12221 N MOPAC EXPY, AUSTIN, TX 78758 (Tel: 5129014009)

๐Ÿ“
Updated Business Mailing Address July 25, 2018

Registered at 12221 N MOPAC EXPY, AUSTIN, TX 787582483 (Tel: 5129014937)

โœ…
NPI Profile Active July 27, 2016

NPI status registered as active in NPPES database

๐Ÿ“
Practice Location (Initial Record) July 27, 2016

Registered at 1520 STOCKTON ST, SAN FRANCISCO, CA 941333354 (Tel: 5072614699)

๐Ÿ“
Business Mailing Address (Initial Record) July 27, 2016

Registered at 1520 STOCKTON ST, SAN FRANCISCO, CA 941333354 (Tel: 5072614699)

๐Ÿ‘ค
Provider Name / Credentials (Initial Record) July 27, 2016

Recorded as JOHN WANG, M.D.

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) July 27, 2016

Internal Medicine (license number reported to NPPES: CA 142039)

๐ŸŸข
Initial NPI Registration & Enumeration April 27, 2012

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1659639607
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: April 27, 2012
Last Update: November 14, 2023
Sole Proprietor: Yes

Other Internal Medicine Providers in Austin

All Internal Medicine Providers in Austin

Mailing Address

12221 N Mopac Expy

Austin, TX 787582483

Phone: 5129014009

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.