Blair J Maerowitz , PA-C
Physician Assistant • Amherst, MA
29 Cottage Street, B (Pioneer Valley Dermatology)
Amherst, MA 010021206
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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Blair Maerowitz is listed in NPPES under Physician Assistant.
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NPI assigned on March 9, 2006; this date does not establish years in practice.
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Published CMS data list 4,430 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – 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 — Established patient outpatient office visit: 1,200 service units.
- 17003 — Destruction of precancer skin growth, 2-14 growths: 1,194 service units.
- 17000 — Destruction of precancer skin growth, 1 growth: 549 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® 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 21 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 1,424 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:
- Triamcinolone Acetonide — 327 prescription fills, including refills.
- Betamethasone Diprop Augmented (Betamethasone/Propylene Glyc) — 136 prescription fills, including refills.
- Doxycycline Monohydrate — 70 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 31 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 95% of clinicians listed under Physician Assistant in Massachusetts (2024, 2,142 clinicians with data). Median for this group: 222. Middle half: 79 to 552.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 3,436 in 2020 to 4,430 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
29 Cottage Street
B (Pioneer Valley Dermatology)
Amherst, MA 010021206
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: Pioneer Valley Dermatology Pc. 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
Duke University School Of Medicine
2002
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
1,307 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 – by Provider, 2024.
Medicare-allowed amount
About $219,698 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 – by Provider and Service, 2024.
Paid by Medicare
About $145,428 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 – by Provider and Service, 2024.
30-day fills
1,629 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
$921,989 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.
Open Payments general payments, program year 2024
All general payments: $240.33 across 5 records.
By nature of payment
- Education: $200.25 across 3 records.
- Food and Beverage: $40.08 across 2 records.
Reporting-company totals
- Janssen Pharmaceuticals, Inc: $184.98 across 2 records.
- Arcutis Biotherapeutics, Inc.: $40.08 across 2 records.
- Pfizer Inc.: $15.27 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 2024 (published June 30, 2026).
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)
Blair Maerowitz 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 Blair Maerowitz 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 Amherst and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 95% of clinicians listed under Physician Assistant in Massachusetts (2024, 2,142 clinicians with data). Median for this group: 222. Middle half: 79 to 552.
Too few clinicians listed under Physician Assistant in Amherst have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 95% of clinicians listed under Physician Assistant in Massachusetts (2024, 2,142 clinicians with data). Median for this group: $19,073. Middle half: $6,686 to $39,911.
Too few clinicians listed under Physician Assistant in Amherst have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 95% of clinicians listed under Physician Assistant in Massachusetts (2024, 2,142 clinicians with data). Median for this group: $14,188. Middle half: $5,025 to $29,930.
Too few clinicians listed under Physician Assistant in Amherst have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 85% of clinicians listed under Physician Assistant in Massachusetts (2024, 2,255 clinicians with data). Median for this group: 175. Middle half: 52 to 564.
Too few clinicians listed under Physician Assistant in Amherst have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 95% of clinicians listed under Physician Assistant in Massachusetts (2024, 2,255 clinicians with data). Median for this group: $2,484. Middle half: $458 to $50,541.
Too few clinicians listed under Physician Assistant in Amherst have Medicare Part D data for 2024 to compare.
12 active clinicians are listed under Physician Assistant with a practice address in Amherst, MA (4,715 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Amherst
8.3% of these 12 clinicians have the CMS telehealth indicator.
33.3% of these 12 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 29% from 3,436 in 2020 to 4,430 in 2024.
- 2020: 3,436
- 2021: 4,199
- 2022: 4,520
- 2023: 4,309
- 2024: 4,430
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Medicare-allowed amount
Medicare-allowed amount increased 22% from $180,458 in 2020 to $219,698 in 2024.
- 2020: $180,458
- 2021: $213,084
- 2022: $215,706
- 2023: $218,644
- 2024: $219,698
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Paid by Medicare
Paid by Medicare increased 17% from $124,426 in 2020 to $145,428 in 2024.
- 2020: $124,426
- 2021: $144,604
- 2022: $140,573
- 2023: $146,962
- 2024: $145,428
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 40% from 1,014 in 2020 to 1,424 in 2024.
- 2020: 1,014
- 2021: 1,203
- 2022: 1,193
- 2023: 1,181
- 2024: 1,424
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30-day fills
30-day fills increased 51% from 1,077 in 2020 to 1,629 in 2024.
- 2020: 1,077
- 2021: 1,262
- 2022: 1,288
- 2023: 1,288
- 2024: 1,629
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Part D drug cost
Part D drug cost increased 124% from $411,595 in 2020 to $921,989 in 2024.
- 2020: $411,595
- 2021: $564,063
- 2022: $678,037
- 2023: $650,702
- 2024: $921,989
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $69.99 in 2021 to $240.33 in 2024.
- 2021: $69.99
- 2022: $79.17
- 2023: $27.38
- 2024: $240.33
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), 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 2024 (payments made January 1 – December 31, 2024): fewer than 11 records totaling $240.33.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Janssen Pharmaceuticals, Inc |
Education
In-kind items and services
|
TREMFYA | General | $99.99 |
| Janssen Pharmaceuticals, Inc |
Education
In-kind items and services
|
TREMFYA | General | $84.99 |
| Arcutis Biotherapeutics, Inc. |
Food and Beverage
In-kind items and services
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Zoryve | General | $20.08 |
| Arcutis Biotherapeutics, Inc. |
Food and Beverage
In-kind items and services
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Zoryve | General | $20.00 |
| Pfizer Inc. |
Education
In-kind items and services
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CIBINQO | General | $15.27 |
Source: CMS Open Payments, program year 2024, 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 2016–2023 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 |
|---|---|---|---|---|
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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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1,200 | 1,006 | $165.58 | $78.84 |
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17003
Destruction of precancer skin growth, 2-14 growths
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1,194 | 292 | $12.33 | $5.89 |
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17000
Destruction of precancer skin growth, 1 growth
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549 | 462 | $124.19 | $50.56 |
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J3301
Injection, triamcinolone acetonide, not otherwise specified, 10 mg
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354 | 50 | $2.19 | $0.97 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
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242 | 223 | $110.12 | $49.28 |
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11102
Biopsy of related skin growth, first growth
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236 | 214 | $184.65 | $83.65 |
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17110
Destruction of skin growth, 1-14 growths
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190 | 173 | $207.37 | $98.32 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
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115 | 115 | $203.73 | $96.62 |
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17261
Destruction of cancer skin growth of trunk, arms, or legs, 0.6-1.0 cm
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62 | 50 | $276.36 | $112.87 |
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11900
Injection into skin growth, 1-7 growths
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56 | 28 | $104.71 | $41.56 |
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11103
Biopsy of related skin growth, each additional growth
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39 | 33 | $89.46 | $44.15 |
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99202
New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more
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34 | 34 | $133.43 | $62.86 |
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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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28 | 27 | $233.66 | $111.19 |
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17271
Destruction of cancer skin growth of scalp, neck, hands, feet, or genitals, 0.6-1.0 cm
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19 | 13 | $303.12 | $130.90 |
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96372
Injection of drug or substance under skin or into muscle
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19 | 15 | $31.57 | $12.51 |
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17004
Destruction of precancer skin growth, 15 or more growths
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18 | 14 | $303.00 | $138.55 |
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17260
Destruction of cancer skin growth of trunk, arms, or legs, 0.5 cm or less
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17 | 13 | $180.94 | $56.75 |
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17262
Destruction of cancer skin growth of trunk, arms, or legs, 1.1-2.0 cm
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17 | 17 | $322.14 | $156.48 |
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17281
Destruction of cancer skin growth of face, ears, eyelids, nose, lips, or mouth, 0.6-1.0 cm
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16 | 13 | $325.46 | $148.12 |
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69100
Biopsy of ear
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13 | 12 | $177.98 | $70.59 |
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Q0112
All potassium hydroxide (koh) preparations
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12 | 12 | $15.00 | $5.71 |
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.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Triamcinolone Acetonide | Triamcinolone Acetonide | 327 | 9,326 | $2,812.89 | 192 |
| Betamethasone Diprop Augmented | Betamethasone/Propylene Glyc | 136 | 3,394 | $3,162.20 | 85 |
| Doxycycline Monohydrate | Doxycycline Monohydrate | 70 | 2,330 | $901.13 | 34 |
| Clobetasol Propionate | Clobetasol Propionate | 67 | 2,431 | $5,291.89 | 43 |
| Dupixent Syringe | Dupilumab | 63 | 1,764 | $235,566.93 | — |
| Imiquimod | Imiquimod | 61 | 1,525 | $1,244.50 | 42 |
| Fluorouracil | Fluorouracil | 60 | 1,874 | $2,875.86 | 53 |
| Metronidazole | Metronidazole | 42 | 1,296 | $1,751.51 | 28 |
| Fluocinonide | Fluocinonide | 42 | 1,213 | $984.79 | 22 |
| Ciclopirox | Ciclopirox Olamine | 42 | 1,233 | $635.98 | 35 |
| Humira(Cf) Pen | Adalimumab | 39 | 1,092 | $249,471.91 | — |
| Nystatin | Nystatin | 38 | 1,125 | $411.89 | 23 |
| Dupixent Pen | Dupilumab | 36 | 980 | $130,891.49 | — |
| Mupirocin | Mupirocin | 35 | 704 | $196.98 | 28 |
| Terbinafine Hcl | Terbinafine Hcl | 33 | 932 | $192.03 | 20 |
| Alclometasone Dipropionate | Alclometasone Dipropionate | 33 | 1,007 | $838.68 | 24 |
| Valacyclovir | Valacyclovir Hcl | 30 | 1,124 | $846.02 | 14 |
| Gabapentin | Gabapentin | 29 | 734 | $376.70 | — |
| Halobetasol Propionate | Halobetasol Propionate | 27 | 794 | $1,102.93 | — |
| Ketoconazole | Ketoconazole | 26 | 751 | $592.95 | 13 |
| Spironolactone | Spironolactone | 22 | 1,020 | $473.43 | — |
| Minoxidil | Minoxidil | 22 | 1,948 | $190.57 | — |
| Tremfya | Guselkumab | 20 | 1,076 | $277,899.60 | — |
| Doxycycline Hyclate | Doxycycline Hyclate | 19 | 592 | $263.77 | — |
| Clindamycin Phosphate | Clindamycin Phosphate | 19 | 720 | $682.87 | — |
(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: 2021-03-15NUCC 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
I20071001000825
MA
2769424993
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
Pioneer Valley Dermatology Pc
29 B Cottage St, Amherst, MA 010021206
Phone: 9783717010
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)
Dermatology
Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)
Physician Assistant - Medical
Physician Assistant (Certified)
Dermatology
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 29 COTTAGE STREET, B (PIONEER VALLEY DERMATOLOGY), AMHERST, MA 010021206 (Tel: 4134063250)
Registered at 29B COTTAGE ST, AMHERST, MA 010021206 (Tel: 5087543823)
NPI status registered as active in NPPES database
Registered at 100 MARTIN LUTHER KING JR. BLVD., WORCESTER, MA 01608 (Tel: 5087543823)
Registered at 100 MARTIN LUTHER KING JR. BLVD, WORCESTER, MA 01608 (Tel: 5087543823)
Recorded as BLAIR MAEROWITZ, PA-C
Physician Assistant (license number reported to NPPES: MA 1521)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Amherst
Mailing Address
29b Cottage St
Amherst, MA 010021206
Phone: 5087543823