Michael Francis O'brien , PA-C
Physician Assistant • Halfmoon, NY
103 Sitterly Rd Ste 2300
Halfmoon, NY 12065
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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Michael O'Brien is listed in NPPES under Physician Assistant.
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NPI assigned on March 31, 2006; this date does not establish years in practice.
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Published CMS data list 240 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:
- 99214 — Established patient outpatient office visit: 118 service units.
- G0439 — Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit: 47 service units.
- 99497 — Advance care planning: 45 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 5 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 1,757 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 — 156 prescription fills, including refills.
- Lisinopril — 118 prescription fills, including refills.
- Rosuvastatin Calcium — 90 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 53 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 60% of clinicians listed under Physician Assistant in New York (2024, 5,025 clinicians with data). Median for this group: 151. Middle half: 53 to 410.
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 224 in 2020 to 240 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
103 Sitterly Rd Ste 2300
Halfmoon, NY 12065
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: Ellis Hospital. 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
1988
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
107 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 $18,287 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 $14,444 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
4,372 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
$190,385 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 2025
All general payments: $1,362.64 across 87 records.
By nature of payment
- Food and Beverage: $1,362.64 across 87 records.
Reporting-company totals (3 largest of 20)
- ABBVIE INC.: $255.69 across 22 records.
- Pfizer Inc.: $248.44 across 17 records.
- Novo Nordisk Inc: $122.71 across 5 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.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
38 years (graduated 1988)
CMS Doctors and Clinicians data list 1988 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)
Michael O'Brien 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 Michael O'Brien 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 Halfmoon and New York
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 60% of clinicians listed under Physician Assistant in New York (2024, 5,025 clinicians with data). Median for this group: 151. Middle half: 53 to 410.
Too few clinicians listed under Physician Assistant in Halfmoon have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 60% of clinicians listed under Physician Assistant in New York (2024, 5,025 clinicians with data). Median for this group: $12,004. Middle half: $4,378 to $28,196.
Too few clinicians listed under Physician Assistant in Halfmoon have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 60% of clinicians listed under Physician Assistant in New York (2024, 5,025 clinicians with data). Median for this group: $8,890. Middle half: $3,209 to $20,987.
Too few clinicians listed under Physician Assistant in Halfmoon have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 80% of clinicians listed under Physician Assistant in Halfmoon, NY (2024, 11 clinicians with data). Median for this group: 1,050. Middle half: 192 to 1,522.
More Part D prescriptions than 85% of clinicians listed under Physician Assistant in New York (2024, 6,800 clinicians with data). Median for this group: 172. Middle half: 46 to 640.
Part D drug cost
A higher Part D drug cost than 95% of clinicians listed under Physician Assistant in Halfmoon, NY (2024, 11 clinicians with data). Median for this group: $77,784. Middle half: $7,439 to $120,522.
A higher Part D drug cost than 80% of clinicians listed under Physician Assistant in New York (2024, 6,800 clinicians with data). Median for this group: $2,860. Middle half: $381 to $63,975.
14 active clinicians are listed under Physician Assistant with a practice address in Halfmoon, NY (15,558 in New York).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Halfmoon
14.3% of these 14 clinicians have the CMS telehealth indicator.
71.4% of these 14 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 varied from year to year: 224 in 2020 and 240 in 2024.
- 2020: 224
- 2021: 253
- 2022: 323
- 2023: 293
- 2024: 240
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Medicare-allowed amount
Medicare-allowed amount increased 30% from $14,097 in 2020 to $18,287 in 2024.
- 2020: $14,097
- 2021: $19,737
- 2022: $24,496
- 2023: $20,986
- 2024: $18,287
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Paid by Medicare
Paid by Medicare increased 40% from $10,282 in 2020 to $14,444 in 2024.
- 2020: $10,282
- 2021: $14,730
- 2022: $18,484
- 2023: $16,564
- 2024: $14,444
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 37% from 1,287 in 2020 to 1,757 in 2024.
- 2020: 1,287
- 2021: 1,970
- 2022: 1,760
- 2023: 1,964
- 2024: 1,757
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30-day fills
30-day fills increased 53% from 2,849 in 2020 to 4,372 in 2024.
- 2020: 2,849
- 2021: 4,693
- 2022: 4,240
- 2023: 4,735
- 2024: 4,372
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Part D drug cost
Part D drug cost increased 295% from $48,172 in 2020 to $190,385 in 2024.
- 2020: $48,172
- 2021: $144,443
- 2022: $110,152
- 2023: $163,579
- 2024: $190,385
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Industry payments (Open Payments)
Industry payments (Open Payments) varied from year to year: $1,277.88 in 2021 and $1,362.64 in 2025.
- 2021: $1,277.88
- 2022: $1,817.14
- 2023: $1,780.32
- 2024: $1,435.61
- 2025: $1,362.64
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
Program year 2025 (payments made January 1 – December 31, 2025): 87 records totaling $1,362.64.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
Wegovy | General | $31.31 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
Wegovy | General | $25.89 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
|
The Cologuard Plus Collection Kit | General | $25.69 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
— | General | $23.97 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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PREVNAR 20 | General | $23.88 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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QULIPTA | General | $23.45 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
PREVNAR 20 | General | $23.32 |
| Abbott Laboratories |
Food and Beverage
In-kind items and services
|
FREESTYLE LIBRE 3 | General | $22.83 |
| Abbott Laboratories |
Food and Beverage
In-kind items and services
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FREESTYLE LIBRE 3 | General | $22.79 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
PREVNAR 20 | General | $22.61 |
| Axsome Therapeutics, Inc. |
Food and Beverage
In-kind items and services
|
Auvelity | General | $22.28 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
VRAYLAR | General | $21.96 |
| Xeris Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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GVOKE HYPOPEN | General | $21.66 |
| VERTEX PHARMACEUTICALS INCORPORATED |
Food and Beverage
In-kind items and services
|
JOURNAVX | General | $21.53 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
|
General - Pain Management | General | $21.50 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
Wegovy | General | $21.16 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
PAXLOVID | General | $21.04 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
Wegovy | General | $20.38 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
VRAYLAR | General | $20.16 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
NURTEC ODT | General | $20.13 |
| Astellas Pharma US Inc |
Food and Beverage
In-kind items and services
|
Veozah | General | $20.06 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
OTEZLA | General | $19.98 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
JARDIANCE | General | $19.97 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
OTEZLA | General | $19.85 |
| Phathom Pharmaceuticals, Inc. |
Food and Beverage
Cash or cash equivalent
|
VOQUEZNA | General | $19.68 |
(top 25 shown)
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 2016–2023 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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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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118 | 84 | $236.56 | $78.34 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
|
47 | 47 | $341.00 | $104.64 |
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99497
Advance care planning, first 30 minutes
|
45 | 45 | $239.73 | $60.42 |
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G0444
Annual depression screening, 5 to 15 minutes
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19 | 19 | $29.00 | $7.29 |
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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
|
11 | 11 | $330.00 | $115.26 |
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 |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 156 | 12,657 | $2,046.46 | 43 |
| Lisinopril | Lisinopril | 118 | 10,540 | $729.49 | 39 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 90 | 7,980 | $2,018.80 | 35 |
| Omeprazole | Omeprazole | 85 | 7,230 | $1,398.08 | 31 |
| Losartan Potassium | Losartan Potassium | 84 | 7,369 | $1,394.91 | 26 |
| Levothyroxine Sodium | Levothyroxine Sodium | 78 | 6,690 | $1,166.32 | 26 |
| Tamsulosin Hcl | Tamsulosin Hcl | 75 | 6,630 | $1,329.39 | 30 |
| Amlodipine Besylate | Amlodipine Besylate | 67 | 5,610 | $323.64 | 25 |
| Hydrochlorothiazide | Hydrochlorothiazide | 63 | 5,670 | $315.34 | 19 |
| Metformin Hcl Er | Metformin Hcl | 55 | 4,530 | $507.44 | 16 |
| Sertraline Hcl | Sertraline Hcl | 52 | 4,320 | $496.83 | 20 |
| Trazodone Hcl | Trazodone Hcl | 51 | 3,450 | $597.41 | 14 |
| Simvastatin | Simvastatin | 44 | 3,960 | $343.90 | 14 |
| Levocetirizine Dihydrochloride | Levocetirizine Dihydrochloride | 36 | 2,610 | $788.08 | 19 |
| Famotidine | Famotidine | 35 | 2,850 | $686.93 | 14 |
| Metformin Hcl | Metformin Hcl | 33 | 2,730 | $246.39 | 13 |
| Pravastatin Sodium | Pravastatin Sodium | 30 | 2,580 | $465.83 | — |
| Escitalopram Oxalate | Escitalopram Oxalate | 29 | 2,250 | $436.33 | — |
| Gabapentin | Gabapentin | 26 | 1,680 | $409.04 | — |
| Fenofibrate | Fenofibrate Nanocrystallized | 26 | 2,160 | $861.59 | — |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 26 | 566 | $622.57 | — |
| Metoprolol Succinate | Metoprolol Succinate | 25 | 2,200 | $166.22 | — |
| Alprazolam | Alprazolam | 24 | 556 | $189.85 | — |
| Mounjaro | Tirzepatide | 24 | 678 | $24,513.87 | — |
| Trulicity | Dulaglutide | 23 | 644 | $21,350.91 | — |
(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
NUCC 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
I20071008000518
NY
3476648270
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
Ellis Hospital
1101 Nott St, Schenecctady, NY 123082425
Phone: 5182434000
Ellis Hospital
103 Sitterly Rd, Halfmoon, NY 120655612
Phone: 5185792800
Ellis Hospital
1101 Nott St, Schenectady, NY 123082425
Phone: 5182431916
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
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 103 SITTERLY RD STE 2300, HALFMOON, NY 12065 (Tel: 5185792650)
Registered at 103 SITTERLY RD STE 2300, HALFMOON, NY 120655646 (Tel: 5185792650)
Recorded as MICHAEL O'BRIEN, PA-C
NPI status registered as active in NPPES database
Registered at 112 CHARLTON RD, BALLSTON LAKE, NY 120192547 (Tel: 5183997723)
Registered at 112 CHARLTON RD, BALLSTON LAKE, NY 120192547 (Tel: 5183997723)
Recorded as MICHAEL O'BRIEN, RPA-C
Physician Assistant (license number reported to NPPES: NY 003610-1)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Halfmoon
- Fallon Etkin, PA-C
- Breanna Tahany, PA
- Angelina Miseno-Callaghan, RPA-C
- Steven Hicks, PA
- Meredyth Monahan, PA
- Laura Engelbrecht, PA-C
Mailing Address
103 Sitterly Rd Ste 2300
Halfmoon, NY 120655646
Phone: 5185792650