Katelyn St. Pierre Isaac , AG-ACNP
Nurse Practitioner โข Augusta, ME
35 Medical Center Pkwy
Augusta, ME 043308160
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 March 10, 2015; this date does not establish years in practice.
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Published CMS data list 177 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:
- 99232 โ Subsequent hospital care with moderate levelof medical decision making: 58 service units.
- 99233 โ Subsequent hospital care with moderate levelof medical decision making: 49 service units.
- 99214 โ Established patient outpatient office visit: 23 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 6 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 244 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Anastrozole โ 55 prescription fills, including refills.
- Ondansetron Odt (Ondansetron) โ 46 prescription fills, including refills.
- Prochlorperazine Maleate โ 35 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 10 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 65% of clinicians listed under Nurse Practitioner in Augusta, ME (2024, 19 clinicians with data). Median for this group: 134. Middle half: 87 to 260.
Close to the middle for Medicare Part B services among clinicians listed under Nurse Practitioner in Maine (2024, 207 clinicians with data). Median for this group: 171. Middle half: 78 to 311.
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 55 in 2019 to 177 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2019โ2024.
Practice Location & Contact Primary Location
35 Medical Center Pkwy
Augusta, ME 043308160
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 5 distinct additional practice-address records in Kennebunk, ME; Portsmouth, NH; Topsham, ME and 1 more. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 2 distinct group names: Maine Center For Cancer Medicine And Blood Disorders Pa; Mainegeneral Medical Center. 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
2014
What Public CMS Data Show
Nurse Practitioner: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
101 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 $13,731 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 $10,529 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
396 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
$18,123 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 โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $311.12 across 7 records.
By nature of payment
- Food and Beverage: $311.12 across 7 records.
Reporting-company totals (3 largest of 4)
- Astellas Pharma US Inc: $134.40 across 1 record.
- AstraZeneca Pharmaceuticals LP: $96.75 across 3 records.
- Genentech, Inc.: $56.38 across 2 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
12 years (graduated 2014)
CMS Doctors and Clinicians data list 2014 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
2015
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
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)
Katelyn Isaac 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 Katelyn Isaac 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 Augusta and Maine
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 65% of clinicians listed under Nurse Practitioner in Augusta, ME (2024, 19 clinicians with data). Median for this group: 134. Middle half: 87 to 260.
Close to the middle for clinicians listed under Nurse Practitioner in Maine (2024, 207 clinicians with data). Median for this group: 171. Middle half: 78 to 311.
Medicare-allowed amount
A higher Medicare-allowed amount than 60% of clinicians listed under Nurse Practitioner in Augusta, ME (2024, 19 clinicians with data). Median for this group: $9,905. Middle half: $7,699 to $17,408.
Close to the middle for clinicians listed under Nurse Practitioner in Maine (2024, 207 clinicians with data). Median for this group: $11,583. Middle half: $4,411 to $20,790.
Paid by Medicare
A higher Medicare payment amount than 65% of clinicians listed under Nurse Practitioner in Augusta, ME (2024, 19 clinicians with data). Median for this group: $7,373. Middle half: $5,830 to $12,927.
Close to the middle for clinicians listed under Nurse Practitioner in Maine (2024, 207 clinicians with data). Median for this group: $8,435. Middle half: $3,252 to $15,377.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Nurse Practitioner in Augusta, ME (2024, 22 clinicians with data). Median for this group: 300. Middle half: 45 to 1,094.
Fewer Part D prescriptions than 60% of clinicians listed under Nurse Practitioner in Maine (2024, 250 clinicians with data). Median for this group: 490. Middle half: 112 to 1,883.
Part D drug cost
Close to the middle for clinicians listed under Nurse Practitioner in Augusta, ME (2024, 22 clinicians with data). Median for this group: $38,845. Middle half: $1,217 to $388,163.
A lower Part D drug cost than 60% of clinicians listed under Nurse Practitioner in Maine (2024, 250 clinicians with data). Median for this group: $49,605. Middle half: $2,282 to $267,332.
36 active clinicians are listed under Nurse Practitioner with a practice address in Augusta, ME (450 in Maine).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Augusta
16.7% of these 36 clinicians have the CMS telehealth indicator.
63.9% of these 36 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 222% from 55 in 2019 to 177 in 2024.
- 2019: 55
- 2021: 177
- 2022: 220
- 2023: 299
- 2024: 177
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Medicare-allowed amount
Medicare-allowed amount increased 399% from $2,754 in 2019 to $13,731 in 2024.
- 2019: $2,754
- 2021: $15,172
- 2022: $18,891
- 2023: $24,391
- 2024: $13,731
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Paid by Medicare
Paid by Medicare increased 386% from $2,166 in 2019 to $10,529 in 2024.
- 2019: $2,166
- 2021: $11,985
- 2022: $14,602
- 2023: $18,940
- 2024: $10,529
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 876% from 25 in 2019 to 244 in 2024.
- 2019: 25
- 2021: 88
- 2022: 209
- 2023: 421
- 2024: 244
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30-day fills
30-day fills increased 1484% from 25 in 2019 to 396 in 2024.
- 2019: 25
- 2021: 97
- 2022: 247
- 2023: 661
- 2024: 396
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Part D drug cost
Part D drug cost went from $224 in 2019 to $18,123 in 2024.
- 2019: $224
- 2021: $1,781
- 2022: $3,958
- 2023: $20,696
- 2024: $18,123
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $158.06 in 2022 to $311.12 in 2025.
- 2022: $158.06
- 2023: $62.51
- 2024: $124.24
- 2025: $311.12
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
Program year 2025 (payments made January 1 โ December 31, 2025): fewer than 11 records totaling $311.12.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Astellas Pharma US Inc |
Food and Beverage
In-kind items and services
|
Padcev | General | $134.40 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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TAGRISSO | General | $34.62 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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LYNPARZA | General | $33.98 |
| Genentech, Inc. |
Food and Beverage
In-kind items and services
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Polivy | General | $29.93 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
|
ENHERTU | General | $28.15 |
| Genentech, Inc. |
Food and Beverage
In-kind items and services
|
Itovebi | General | $26.45 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
|
Fabhalta | General | $23.59 |
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 2018โ2023 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, 2019โ2024; 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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99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
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58 | 36 | $153.62 | $62.38 |
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99233
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
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49 | 38 | $188.22 | $92.39 |
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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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23 | 20 | $109.87 | $74.52 |
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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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17 | 16 | $31.00 | $13.11 |
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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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15 | 15 | $147.27 | $113.47 |
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99223
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
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15 | 15 | $364.67 | $129.78 |
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 |
|---|---|---|---|---|---|
| Anastrozole | Anastrozole | 55 | 3,218 | $920.91 | 16 |
| Ondansetron Odt | Ondansetron | 46 | 644 | $1,075.88 | 35 |
| Prochlorperazine Maleate | Prochlorperazine Maleate | 35 | 262 | $368.97 | 29 |
| Prednisone | Prednisone | 22 | 1,252 | $153.33 | 12 |
| Eliquis | Apixaban | 17 | 713 | $14,117.79 | โ |
| Letrozole | Letrozole | 16 | 1,427 | $522.76 | โ |
| Tamoxifen Citrate | Tamoxifen Citrate | 16 | 1,410 | $438.36 | โ |
| Oxycodone Hcl | Oxycodone Hcl | 15 | 163 | $206.80 | 12 |
| Loperamide | Loperamide Hcl | 11 | 279 | $92.18 | โ |
| Dexamethasone | Dexamethasone | 11 | 305 | $226.21 | โ |
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: 2026-04-20NUCC Taxonomy Code: 363L00000X
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - NURSE PRACTITIONER
I20250317000963
NH
3476861816
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
Mainegeneral Medical Center
35 Medical Ctr Pkwy, Augusta, ME 043308160
Phone: 2076211000
Mainegeneral Medical Center
149 N St, Waterville, ME 04901
Phone: 2078721000
Maine Center For Cancer Medicine And Blood Disorders Pa
155 Borthwick Ave, Portsmouth, NH 038017156
Phone: 6038280100
Maine Center For Cancer Medicine And Blood Disorders Pa
11 Rock Row, Westbrook, ME 040924877
Phone: 2073033300
Mainegeneral Medical Center
361 Old Belgrade Rd, Augusta, ME 043308058
Phone: 2076216100
Secondary Practice Locations
2 Independence Dr
Kennebunk, ME 040436078
Phone: 2073033300
155 Borthwick Ave Ste C
Portsmouth, NH 038017156
Phone: 6038280100
11 Rock Row Ste 120
Westbrook, ME 040924877
Phone: 2073033300
15 Rock Row Ste 110
Westbrook, ME 040924877
Phone: 2073033300
105 Topsham Fair Mall Rd Unit 1
Topsham, ME 040861773
Phone: 2073033300
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Obstetrics & Gynecology
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Osteopathic Medicine (D.O.)
Otolaryngology
Otolaryngology
Doctor of Medicine (M.D.)
Family Medicine
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at PO BOX 911, BRATTLEBORO, VT 053020911 (Tel: 2073033300)
NPI status registered as active in NPPES database
Registered at 35 MEDICAL CENTER PKWY, AUGUSTA, ME 043308160 (Tel: 2076214116)
Registered at 35 MEDICAL CENTER PKWY, AUGUSTA, ME 043308160 (Tel: 2076214116)
Recorded as KATELYN ISAAC, AG-ACNP
Nurse Practitioner (license number reported to NPPES: ME CNP151017)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Nurse Practitioners in Augusta
- Nicole Ouellette, ACNPC-AG
- Jessica Douin, NP
- Lisa Hopkins
- Emily Snow, FNP
- Kenneth Delker
- Cheryl Godbey, NP
More public profiles in Maine
Directory navigation, in NPI number order.
- Tony Varghese, MD Internal Medicine ยท Baltimore
- Daria Hanson, MD Psychiatry & Neurology - Psychiatry ยท Westbrook
- Kim Tousignant, PsyD Psychologist - Clinical ยท Bucksport
- Karl Woods, DMD Dentist ยท Houlton
- Osama El Silimy, MD Otolaryngology ยท Caribou
- Ann Marie Sellinger, CRNA Nurse Anesthetist, Certified Registered ยท Portland
- Drexel Gordon, DO Family Medicine ยท Bridgton
- Susan Holloran, CRNA Nurse Anesthetist, Certified Registered ยท Brunswick
- Jessica Philbrook, OD Optometrist ยท Houlton
- John Chase, FNP Nurse Practitioner - Family ยท Bangor
- Smita Sonti, MD Family Medicine ยท Scarborough
- Thomas Earl, MD Internal Medicine - Interventional Cardiology ยท Bangor
Mailing Address
Po Box 911
Brattleboro, VT 053020911
Phone: 2073033300