Tammy L Welch , PA-C
Physician Assistant โข Frederick, MD
1562 Opossumtown Pike
Frederick, MD 217024920
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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NPI assigned on July 14, 2005; this date does not establish years in practice.
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Published CMS data list 510 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99213 โ Established patient outpatient office visit: 179 service units.
- G2211 โ Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's: 154 service units.
- 99215 โ Established patient outpatient office visit: 69 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 7 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 110 Medicare Part D prescriptions, including refills, in 2017.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2017. Published rows only; this is not a quality measure.
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Published Part D records, 2017:
- Oxycodone Hcl โ 32 prescription fills, including refills.
- Meloxicam โ 28 prescription fills, including refills.
- Warfarin Sodium โ 21 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2017. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 5 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Close to the middle for Medicare Part B services among clinicians listed under Physician Assistant in Frederick, MD (2024, 62 clinicians with data). Median for this group: 489. Middle half: 254 to 808.
More Medicare Part B services than 60% of clinicians listed under Physician Assistant in Maryland (2024, 1,555 clinicians with data). Median for this group: 282. Middle half: 86 to 792.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 106 in 2020 to 510 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
1562 Opossumtown Pike
Frederick, MD 217024920
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Frederick Health Medical Group Llc. 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
1999
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
306 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $36,074 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.
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 โ by Provider and Service, 2024.
Paid by Medicare
About $25,889 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, 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 โ by Provider and Service, 2024.
30-day fills
110 standardized 30-day fills in 2017
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
$1,126 in 2017
The total cost of these prescriptions in 2017, 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 โ by Provider and Drug, 2017.
Open Payments general payments, program year 2025
All general payments: $3,313.85 across 9 records.
By nature of payment
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program: $3,000.00 across 2 records.
- Food and Beverage: $313.85 across 7 records.
Reporting-company totals (3 largest of 4)
- INTUITIVE SURGICAL, INC.: $3,000.00 across 2 records.
- AstraZeneca Pharmaceuticals LP: $253.16 across 5 records.
- Merck Sharp & Dohme LLC: $34.38 across 1 record.
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.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
27 years (graduated 1999)
CMS Doctors and Clinicians data list 1999 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
2005
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, โDoes your provider accept Medicare as full payment?โ
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
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.
Enrolled in Medicare (PECOS)
Tammy Welch 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 Welch 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 Frederick and Maryland
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Close to the middle for clinicians listed under Physician Assistant in Frederick, MD (2024, 62 clinicians with data). Median for this group: 489. Middle half: 254 to 808.
More Medicare Part B services than 60% of clinicians listed under Physician Assistant in Maryland (2024, 1,555 clinicians with data). Median for this group: 282. Middle half: 86 to 792.
Medicare-allowed amount
Close to the middle for clinicians listed under Physician Assistant in Frederick, MD (2024, 62 clinicians with data). Median for this group: $37,587. Middle half: $18,664 to $85,255.
A higher Medicare-allowed amount than 60% of clinicians listed under Physician Assistant in Maryland (2024, 1,555 clinicians with data). Median for this group: $23,780. Middle half: $8,384 to $55,296.
Paid by Medicare
Close to the middle for clinicians listed under Physician Assistant in Frederick, MD (2024, 62 clinicians with data). Median for this group: $27,503. Middle half: $14,341 to $64,827.
Close to the middle for clinicians listed under Physician Assistant in Maryland (2024, 1,555 clinicians with data). Median for this group: $17,933. Middle half: $6,264 to $41,140.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Tammy Welch are from 2017.
106 active clinicians are listed under Physician Assistant with a practice address in Frederick, MD (3,225 in Maryland).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Frederick
23.6% of these 106 clinicians have the CMS telehealth indicator.
69.8% of these 106 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 B services
Medicare Part B services increased 381% from 106 in 2020 to 510 in 2024.
- 2020: 106
- 2021: 160
- 2022: 270
- 2023: 392
- 2024: 510
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Medicare-allowed amount
Medicare-allowed amount increased 437% from $6,720 in 2020 to $36,074 in 2024.
- 2020: $6,720
- 2021: $18,170
- 2022: $29,085
- 2023: $41,078
- 2024: $36,074
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Paid by Medicare
Paid by Medicare increased 382% from $5,366 in 2020 to $25,889 in 2024.
- 2020: $5,366
- 2021: $14,029
- 2022: $21,847
- 2023: $30,665
- 2024: $25,889
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 57% from 70 in 2014 to 110 in 2017.
- 2014: 70
- 2015: 98
- 2016: 112
- 2017: 110
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30-day fills
30-day fills increased 57% from 70 in 2014 to 110 in 2017.
- 2014: 70
- 2015: 98
- 2016: 116
- 2017: 110
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Part D drug cost
Part D drug cost went from $667 in 2014 to $1,126 in 2017.
- 2014: $667
- 2015: $1,452
- 2016: $724
- 2017: $1,126
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $92.60 in 2021 to $3,313.85 in 2025.
- 2021: $92.60
- 2022: $41.24
- 2023: $364.94
- 2024: $2,810.52
- 2025: $3,313.85
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2017), 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
Program year 2025 (payments made January 1 โ December 31, 2025): fewer than 11 records totaling $3,313.85.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| INTUITIVE SURGICAL, INC. |
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
|
Da Vinci Surgical System | General | $1,500.00 |
| INTUITIVE SURGICAL, INC. |
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
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Da Vinci Surgical System | General | $1,500.00 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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โ | General | $161.65 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
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KEYTRUDA | General | $34.38 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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โ | General | $27.86 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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โ | General | $27.75 |
| Pulmonx Corporation |
Food and Beverage
In-kind items and services
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CHARTIS CATHETER | General | $26.31 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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โ | General | $18.89 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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โ | General | $17.01 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 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, 2017โ2024; 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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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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179 | 165 | $181.00 | $75.67 |
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G2211
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
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154 | 141 | $32.00 | $13.91 |
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99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
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69 | 69 | $359.00 | $153.49 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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44 | 42 | $255.00 | $107.21 |
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99441
Telephone medical discussion with physician, 5-10 minutes
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28 | 28 | $112.00 | $47.91 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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18 | 18 | $333.00 | $130.47 |
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99442
Telephone medical discussion with physician, 11-20 minutes
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18 | 17 | $180.00 | $77.16 |
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 2017.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Oxycodone Hcl | Oxycodone Hcl | 32 | 254 | $399.30 | 30 |
| Meloxicam | Meloxicam | 28 | 838 | $48.68 | โ |
| Warfarin Sodium | Warfarin Sodium | 21 | 627 | $134.18 | 21 |
| Enoxaparin Sodium | Enoxaparin Sodium | 17 | 34 | $401.17 | 17 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 12 | 100 | $142.50 | 12 |
Source: CMS Part D by Provider and Drug, 2017; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-06-17NUCC 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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20110307000659
DC
4789663428
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
Frederick Health Medical Group Llc
194 Thomas Johnson Dr, Frederick, MD 217024679
Phone: 2402156310
Frederick Health Medical Group Llc
16403 Old Emmitsburg Rd, Emmitsburg, MD 217278929
Phone: 2402156310
Frederick Health Medical Group Llc
1 Frederick Health Way, Frederick, MD 217019435
Phone: 2402156310
Frederick Health Medical Group Llc
1194 Dutchmans Creek Dr, Brunswick, MD 217169786
Phone: 2402156310
Frederick Health Medical Group Llc
501 W 7th St, Frederick, MD 217015096
Phone: 2402156310
Frederick Health Medical Group Llc
400 W 7th St, Frederick, MD 217014506
Phone: 2402156310
Frederick Health Medical Group Llc
7211 Bank Ct, Frederick, MD 217038482
Phone: 2402156310
Frederick Health Medical Group Llc
504 E Ridgeville Blvd, Mount Airy, MD 217715942
Phone: 2402156310
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Surgery
Doctor of Medicine (M.D.)
Surgery - Surgical Oncology
Doctor of Medicine (M.D.)
Dietitian, Registered
Registered Dietitian, Licensed Dietitian Nutritionist
Nurse Practitioner - Adult Health
Certified Registered Nurse Practitioner
Surgery - Plastic and Reconstructive Surgery
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 1562 OPOSSUMTOWN PIKE, FREDERICK, MD 217024920 (Tel: 3016945861)
Registered at 1 FREDERICK HEALTH WAY, FREDERICK, MD 217019435
Registered at 20410 OBSERVATION DR STE 100, GERMANTOWN, MD 208766419 (Tel: 3017620277)
Registered at 20410 OBSERVATION DR STE 100, GERMANTOWN, MD 208766419 (Tel: 3017620277)
NPI status registered as active in NPPES database
Registered at 501 W 7TH ST STE D, FREDERICK, MD 217014589 (Tel: 3016945861)
Registered at 501 W 7TH ST STE D, FREDERICK, MD 217014589 (Tel: 3016945861)
Recorded as TAMMY WELCH, PAC
Physician Assistant (license number reported to NPPES: MD C0002632)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Frederick
- Jeffrey Lee
- Festus Agyekum, PA-C
- Scottie Berk
- Laura Schulte, PA-C
- Pamela Mumba, PA
- Kristen Smoker, PA-C
Mailing Address
1 Frederick Health Way
Frederick, MD 217019435