Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Dr. Young Thi Mcmahan , MD

Dermatology • Waco, TX

Active NPI 1013352145 Individual Practitioner Female Practitioner Accepts Medicare assignment
Practice location in NPPES

300 Richland West Cir Ste 2c
Waco, TX 767127935

Call 2543406000 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

300 Richland West Cir Ste 2c

Waco, TX 767127935

Telephone 2543406000
Other Listings in Public Data

NPPES lists 1 additional practice-address record in Galveston, TX. See the list

Source: CMS NPPES NPI Registry, practice location records; release date unavailable.

CMS Doctors and Clinicians lists 1 group name: Oliver Street 5.01(A) 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

Graduation Year

2017

Medicare patients

893 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 – by Provider, 2024.

Medicare-allowed amount

About $347,329 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 – by Provider and Service, 2024.

Paid by Medicare

About $252,618 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 – by Provider and Service, 2024.

30-day fills

1,251 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

$599,935 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 – by Provider and Drug, 2024.

Open Payments general payments, program year 2025

All general payments: $2,336.19 across 129 records.

By nature of payment

  • Food and Beverage: $2,326.54 across 128 records.
  • Education: $9.65 across 1 record.

Reporting-company totals (3 largest of 19)

  • UCB, Inc.: $326.57 across 17 records.
  • ABBVIE INC.: $303.73 across 15 records.
  • Eli Lilly and Company: $208.12 across 11 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

9 years (graduated 2017)

CMS Doctors and Clinicians data list 2017 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

2013

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, “Does your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

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.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Mcmahan 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. Mcmahan 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 Waco and Texas

Billing and prescribing volume is not a quality rating.

Medicare Part B services

More Medicare Part B services than 75% of clinicians listed under Dermatology in Texas (2024, 827 clinicians with data). Median for this group: 2,195. Middle half: 1,085 to 4,742.

Too few clinicians listed under Dermatology in Waco have Medicare Part B data for 2024 to compare.

Medicare-allowed amount

A higher Medicare-allowed amount than 75% of clinicians listed under Dermatology in Texas (2024, 827 clinicians with data). Median for this group: $135,212. Middle half: $65,517 to $291,099.

Too few clinicians listed under Dermatology in Waco have Medicare Part B data for 2024 to compare.

Paid by Medicare

A higher Medicare payment amount than 75% of clinicians listed under Dermatology in Texas (2024, 827 clinicians with data). Median for this group: $95,715. Middle half: $45,692 to $209,369.

Too few clinicians listed under Dermatology in Waco have Medicare Part B data for 2024 to compare.

Medicare Part D prescriptions

More Part D prescriptions than 80% of clinicians listed under Dermatology in Texas (2024, 922 clinicians with data). Median for this group: 486. Middle half: 202 to 949.

Too few clinicians listed under Dermatology in Waco 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 Dermatology in Texas (2024, 922 clinicians with data). Median for this group: $81,547. Middle half: $6,986 to $226,319.

Too few clinicians listed under Dermatology in Waco have Medicare Part D data for 2024 to compare.

10 active clinicians are listed under Dermatology with a practice address in Waco, TX (1,173 in Texas).

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

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 · 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 · Program Year 2025
Disclosure Year:

Program year 2025 (payments made January 1 – December 31, 2025): 129 records totaling $2,336.19.

Manufacturer Payment Nature Product Type Amount ($)
Sanofi and Genzyme US Companies
Food and Beverage
In-kind items and services
DUPIXENT General $33.44
Sanofi and Genzyme US Companies
Food and Beverage
In-kind items and services
DUPIXENT General $33.03
Sanofi and Genzyme US Companies
Food and Beverage
In-kind items and services
DUPIXENT General $32.32
Janssen Pharmaceuticals, Inc
Food and Beverage
In-kind items and services
TREMFYA General $32.10
Eli Lilly and Company
Food and Beverage
In-kind items and services
TALTZ General $31.40
ABBVIE INC.
Food and Beverage
In-kind items and services
RINVOQ General $30.59
ABBVIE INC.
Food and Beverage
In-kind items and services
RINVOQ General $30.30
Regeneron Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
DUPIXENT General $30.12
UCB, Inc.
Food and Beverage
In-kind items and services
Bimzelx General $29.20
Regeneron Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
DUPIXENT General $27.87
Incyte Corporation
Food and Beverage
Cash or cash equivalent
OPZELURA General $27.19
Incyte Corporation
Food and Beverage
Cash or cash equivalent
OPZELURA General $26.89
LEO Pharma Inc.
Food and Beverage
In-kind items and services
ADBRY General $26.64
ABBVIE INC.
Food and Beverage
In-kind items and services
RINVOQ General $26.57
SpringWorks Therapeutics, Inc.
Food and Beverage
In-kind items and services
GOMEKLI General $26.44
ABBVIE INC.
Food and Beverage
In-kind items and services
RINVOQ General $26.40
LEO Pharma Inc.
Food and Beverage
In-kind items and services
ADBRY General $26.30
LEO Pharma Inc.
Food and Beverage
In-kind items and services
ADBRY General $25.54
Novartis Pharmaceuticals Corporation
Food and Beverage
In-kind items and services
COSENTYX General $25.32
Novartis Pharmaceuticals Corporation
Food and Beverage
In-kind items and services
COSENTYX General $25.26
Amgen Inc.
Food and Beverage
In-kind items and services
OTEZLA General $25.10
UCB, Inc.
Food and Beverage
In-kind items and services
Bimzelx General $24.88
Incyte Corporation
Food and Beverage
Cash or cash equivalent
OPZELURA General $24.86
Novartis Pharmaceuticals Corporation
Food and Beverage
In-kind items and services
COSENTYX General $24.82
Regeneron Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
DUPIXENT General $24.81

(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 · Data Year 2024
Reporting Year:

CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 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 – by Provider and Service data, 2017–2024; 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
17003 Destruction of precancer skin growth, 2-14 growths
2,431 355 $23.00 $6.58
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
981 611 $309.00 $90.85
17000 Destruction of precancer skin growth, 1 growth
676 440 $231.00 $55.80
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
359 246 $435.00 $127.88
11102 Biopsy of related skin growth, first growth
312 259 $341.00 $93.52
17110 Destruction of skin growth, 1-14 growths
154 134 $388.00 $111.07
11103 Biopsy of related skin growth, each additional growth
152 91 $171.00 $50.23
17004 Destruction of precancer skin growth, 15 or more growths
119 82 $570.00 $167.70
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
105 105 $379.00 $111.70
11602 Removal of cancer skin growth of body, arms, or legs, 1.1-2.0 cm
95 77 $833.00 $135.10
12032 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm
93 80 $1032.00 $300.14
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
41 41 $567.00 $169.01
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
35 28 $192.00 $57.08
12034 Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 7.6-12.5 cm
19 15 $1137.00 $336.74
11622 Removal of cancer skin growth of scalp, neck, hands, feet, or genitals, 1.1-2.0 cm
16 16 $862.00 $135.86
12042 Intermediate repair of wound of neck, hands, feet, or genitals, 2.6-7.5 cm
16 16 $1054.00 $294.17
11104 Punch biopsy, first skin growth
15 15 $425.00 $124.51
12052 Intermediate repair of wound of face, ears, eyelids, nose, lips, or mouth, 2.6-5.0 cm
13 12 $1072.00 $298.36
11642 Removal of cancer skin growth of face, ears, eyelids, nose, lips, or mouth, 1.1-2.0 cm
12 11 $913.00 $139.64
69100 Biopsy of ear
12 12 $325.00 $75.90
11603 Removal of cancer skin growth of body, arms, or legs, 2.1-3.0 cm
11 11 $948.00 $153.65

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 · Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Triamcinolone Acetonide Triamcinolone Acetonide 191 5,746 $1,511.58 142
Ketoconazole Ketoconazole 174 4,983 $3,194.08 84
Clobetasol Propionate Clobetasol Propionate 157 4,695 $6,806.95 91
Doxycycline Hyclate Doxycycline Hyclate 123 2,192 $1,536.86 94
Hydrocortisone Hydrocortisone 82 2,123 $390.90 62
Dupixent Pen Dupilumab 61 1,792 $229,839.51 —
Mupirocin Mupirocin 49 1,072 $535.16 38
Clindamycin Phosphate Clindamycin Phosphate 29 814 $711.40 15
Fluocinonide Fluocinonide 28 952 $1,317.41 13
Prednisone Prednisone 27 824 $204.00 16
Metronidazole Metronidazole 24 703 $953.87 —
Hydroxychloroquine Sulfate Hydroxychloroquine Sulfate 21 1,290 $372.65 —
Montelukast Sodium Montelukast Sodium 18 900 $177.85 —
Valacyclovir Valacyclovir Hcl 18 88 $107.78 14
Tacrolimus Tacrolimus 16 470 $1,714.30 —
Fluconazole Fluconazole 14 724 $326.18 —
Minoxidil Minoxidil 14 720 $136.22 —
Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav 13 374 $320.81 —
Humira(Cf) Pen Adalimumab 13 364 $86,913.44 —
Skyrizi Pen Risankizumab-Rzaa 13 1,092 $262,008.96 —
Ciclopirox Ciclopirox 12 336 $195.98 —
Imiquimod Imiquimod 12 343 $658.66 —

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

Dermatology Primary Specialty

NUCC Taxonomy Code: 207N00000X

License # reported to NPPES TX R0078

A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.

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 - DERMATOLOGY

Medicare Enrollment ID

I20170517002383

Enrollment State Jurisdiction

TX

PECOS Control ID

1658648928

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

Oliver Street 5.01(A) Inc

300 Richland W Cir, Waco, TX 767127935

Phone: 2543406000

Secondary Practice Locations

301 University Blvd, 4.112 Mccullough

Galveston, TX 775557934

Phone: 4097721911

Clinicians Sharing This Practice Address or Phone

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

2 listed
NPI 1487074084

Doctor of Medicine (M.D.), Master of Business Administration

Shea Young , PA-C

Physician Assistant

NPI 1912161589

Physician Assistant (Certified)

Career & Practice History Timeline

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

11 Historical Events
âś…
NPI Profile Active June 14, 2017

NPI status registered as active in NPPES database

📍
Updated Practice Location June 14, 2017

Registered at 300 RICHLAND WEST CIR STE 2C, WACO, TX 767127935 (Tel: 2543406000)

📍
Updated Business Mailing Address June 14, 2017

Registered at 300 RICHLAND W CIR #2C, WACO, TX 76712 (Tel: 2543406000)

👤
Provider Name / Credentials Updated June 14, 2017

Recorded as YOUNG MCMAHAN, M.D.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) June 14, 2017

Dermatology (license number reported to NPPES: TX R0078)

âś…
NPI Profile Active November 02, 2016

NPI status registered as active in NPPES database

📍
Practice Location (Initial Record) November 02, 2016

Registered at 301 UNIVERSITY BLVD, 4.112 MCCULLOUGH, GALVESTON, TX 775557934 (Tel: 4097721911)

📍
Business Mailing Address (Initial Record) November 02, 2016

Registered at 301 UNIVERSITY BLVD, 4.112 MCCULLOUGH, GALVESTON, TX 775557934 (Tel: 4097721911)

👤
Provider Name / Credentials (Initial Record) November 02, 2016

Recorded as YOUNG MCMAHAN, M.D.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) November 02, 2016

Student in an Organized Health Care Education/Training Program

🟢
Initial NPI Registration & Enumeration May 02, 2013

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1013352145
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: May 02, 2013
Last Update: March 17, 2018
Sole Proprietor: No

Other Dermatology Specialists in Waco

Healthcare providers in Waco

More public profiles in Texas

Directory navigation, in NPI number order.

Mailing Address

300 Richland W Cir #2c

Waco, TX 76712

Phone: 2543406000

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.