Aimee Elizabeth Foster Keller , MS, FNP-BC
Nurse Practitioner โข Waltham, MA
52 Second Ave Ste 520
Waltham, MA 024511142
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 30, 2019; this date does not establish years in practice.
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Published CMS data list 403 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:
- 99214 โ Established patient outpatient office visit: 296 service units.
- 99215 โ Established patient outpatient office visit: 107 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 the full table ยท Guide: How to read Medicare Part B data
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Published CMS data list 4,508 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:
- Metoprolol Succinate โ 554 prescription fills, including refills.
- Atorvastatin Calcium โ 464 prescription fills, including refills.
- Eliquis (Apixaban) โ 367 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 49 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 Nurse Practitioner in Waltham, MA (2024, 12 clinicians with data). Median for this group: 422. Middle half: 107 to 548.
More Medicare Part B services than 60% of clinicians listed under Nurse Practitioner in Massachusetts (2024, 1,536 clinicians with data). Median for this group: 293. Middle half: 113 to 625.
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 393 in 2023 to 403 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023โ2024.
Practice Location & Contact Primary Location
52 Second Ave Ste 520
Waltham, MA 024511142
CMS Doctors and Clinicians lists 1 group name: Massachusetts General Physicians Organization Inc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
University Of Massachusetts Medical School
2019
What Public CMS Data Show
Nurse Practitioner: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
251 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 $52,896 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 $40,662 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
11,780 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
$1,548,159 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.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021โ2025.
Years since graduation
7 years (graduated 2019)
CMS Doctors and Clinicians data list 2019 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
2019
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)
Aimee Keller 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 Aimee Keller 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 Waltham and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Close to the middle for clinicians listed under Nurse Practitioner in Waltham, MA (2024, 12 clinicians with data). Median for this group: 422. Middle half: 107 to 548.
More Medicare Part B services than 60% of clinicians listed under Nurse Practitioner in Massachusetts (2024, 1,536 clinicians with data). Median for this group: 293. Middle half: 113 to 625.
Medicare-allowed amount
A higher Medicare-allowed amount than 70% of clinicians listed under Nurse Practitioner in Waltham, MA (2024, 12 clinicians with data). Median for this group: $46,659. Middle half: $12,420 to $53,509.
A higher Medicare-allowed amount than 75% of clinicians listed under Nurse Practitioner in Massachusetts (2024, 1,536 clinicians with data). Median for this group: $24,187. Middle half: $9,751 to $49,233.
Paid by Medicare
A higher Medicare payment amount than 80% of clinicians listed under Nurse Practitioner in Waltham, MA (2024, 12 clinicians with data). Median for this group: $35,991. Middle half: $8,912 to $39,685.
A higher Medicare payment amount than 75% of clinicians listed under Nurse Practitioner in Massachusetts (2024, 1,536 clinicians with data). Median for this group: $18,312. Middle half: $7,110 to $37,062.
Medicare Part D prescriptions
More Part D prescriptions than 90% of clinicians listed under Nurse Practitioner in Waltham, MA (2024, 13 clinicians with data). Median for this group: 238. Middle half: 98 to 1,354.
More Part D prescriptions than 95% of clinicians listed under Nurse Practitioner in Massachusetts (2024, 1,589 clinicians with data). Median for this group: 330. Middle half: 89 to 1,072.
Part D drug cost
A higher Part D drug cost than 95% of clinicians listed under Nurse Practitioner in Waltham, MA (2024, 13 clinicians with data). Median for this group: $46,184. Middle half: $16,146 to $122,722.
A higher Part D drug cost than 95% of clinicians listed under Nurse Practitioner in Massachusetts (2024, 1,589 clinicians with data). Median for this group: $25,224. Middle half: $1,758 to $161,316.
25 active clinicians are listed under Nurse Practitioner with a practice address in Waltham, MA (3,483 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Waltham
24% of these 25 clinicians have the CMS telehealth indicator.
44% of these 25 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 stayed about the same: 393 in 2023 and 403 in 2024.
- 2023: 393
- 2024: 403
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Medicare-allowed amount
Medicare-allowed amount increased 222% from $16,441 in 2023 to $52,896 in 2024.
- 2023: $16,441
- 2024: $52,896
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Paid by Medicare
Paid by Medicare increased 214% from $12,941 in 2023 to $40,662 in 2024.
- 2023: $12,941
- 2024: $40,662
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Medicare Part D prescriptions
CMS data for Part D prescriptions are available for 2024 only.
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30-day fills
CMS data for 30-day fills are available for 2024 only.
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Part D drug cost
CMS data for Part D drug cost are available for 2024 only.
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2022โ2023 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, 2023โ2024; 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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296 | 202 | $555.94 | $118.52 |
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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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107 | 86 | $777.33 | $166.49 |
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 |
|---|---|---|---|---|---|
| Metoprolol Succinate | Metoprolol Succinate | 554 | 45,906 | $11,556.51 | 243 |
| Atorvastatin Calcium | Atorvastatin Calcium | 464 | 40,286 | $6,416.13 | 205 |
| Eliquis | Apixaban | 367 | 26,585 | $502,043.15 | 141 |
| Amlodipine Besylate | Amlodipine Besylate | 281 | 24,302 | $2,190.77 | 117 |
| Losartan Potassium | Losartan Potassium | 211 | 17,724 | $1,832.78 | 86 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 196 | 16,905 | $6,723.32 | 95 |
| Ezetimibe | Ezetimibe | 177 | 15,546 | $9,859.02 | 80 |
| Jardiance | Empagliflozin | 173 | 10,428 | $192,173.66 | 61 |
| Lisinopril | Lisinopril | 167 | 14,361 | $1,168.79 | 77 |
| Spironolactone | Spironolactone | 161 | 11,951 | $833.71 | 72 |
| Irbesartan | Irbesartan | 133 | 10,456 | $3,671.17 | 51 |
| Torsemide | Torsemide | 125 | 8,404 | $3,175.51 | 48 |
| Entresto | Sacubitril/Valsartan | 120 | 7,125 | $150,574.22 | 44 |
| Furosemide | Furosemide | 119 | 9,202 | $614.74 | 56 |
| Isosorbide Mononitrate Er | Isosorbide Mononitrate | 118 | 8,518 | $1,440.73 | 46 |
| Carvedilol | Carvedilol | 104 | 9,015 | $1,282.70 | 45 |
| Hydrochlorothiazide | Hydrochlorothiazide | 94 | 7,680 | $274.74 | 44 |
| Xarelto | Rivaroxaban | 78 | 5,720 | $104,962.23 | 27 |
| Valsartan | Valsartan | 73 | 5,028 | $1,907.50 | 28 |
| Clopidogrel | Clopidogrel Bisulfate | 64 | 5,756 | $977.45 | 29 |
| Pyridostigmine Bromide | Pyridostigmine Bromide | 61 | 5,059 | $3,874.72 | 33 |
| Diltiazem 24hr Er (Cd) | Diltiazem Hcl | 60 | 4,700 | $1,846.77 | 19 |
| Repatha Sureclick | Evolocumab | 47 | 2,164 | $41,541.72 | 13 |
| Farxiga | Dapagliflozin Propanediol | 38 | 2,700 | $48,850.33 | 12 |
| Pravastatin Sodium | Pravastatin Sodium | 36 | 3,300 | $861.80 | 15 |
(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: 2024-06-03NUCC 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.
NUCC Taxonomy Code: 163W00000X
(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive either a diploma from a hospital program, an associate degree in nursing (A.D.N.) or a Bachelor of Science degree in nursing (B.S.N.), who is licensed or certified by the state, and is practicing within the scope of that license or certification. R.N.'s assist patient in recovering and maintaining their physical or mental health. They assist physicians during treatments and examinations and administer medications. (2) A provider who is trained and educated in a formal nursing education program at an accredited school of nursing, passes a national certification examination, and is licensed by the state to practice nursing. The individual provides nursing services to patients or clients in areas such as health promotion, disease prevention, acute and chronic care and restoration and maintenance of health across the life span.
NUCC Taxonomy Code: 363LF0000X
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - NURSE PRACTITIONER
I20200826003427
MA
2668899303
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
Massachusetts General Physicians Organization Inc
55 Fruit St, Boston, MA 021142696
Phone: 6177240287
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine - Cardiovascular Disease
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 52 SECOND AVE STE 520, WALTHAM, MA 024511142 (Tel: 7814876000)
Registered at 52 SECOND AVE STE 520, WALTHAM, MA 024511142 (Tel: 7814876000)
Recorded as AIMEE KELLER, MS, FNP-BC
Registered at 52 SECOND AVE, SUITE 2600, WALTHAM, MA 02451 (Tel: 7814873838)
Registered at 52 2ND AVE STE 2600, WALTHAM, MA 024511155 (Tel: 7814873838)
NPI status registered as active in NPPES database
Registered at 113 WILDER ST STE 200, LOWELL, MA 018543057 (Tel: 9789344525)
Registered at 113 WILDER ST STE 200, LOWELL, MA 018543057 (Tel: 9789344525)
Recorded as AIMEE FOSTER, MS, FNP-BC
Registered Nurse (license number reported to NPPES: MA RN2274206)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Nurse Practitioners in Waltham
All Nurse Practitioners in WalthamMailing Address
52 Second Ave Ste 520
Waltham, MA 024511142
Phone: 7814876000