Dr. Barbara E Amsler , MD
Internal Medicine • Algonquin, IL
2971 W Algonquin Rd, Suite 103
Algonquin, IL 601029406
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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Dr. Barbara Amsler is listed in NPPES under Internal Medicine.
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NPI assigned on August 9, 2006; this date does not establish years in practice.
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Published CMS data list 320 Original Medicare Part B services in 2022.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022. Published rows only; this is not a quality measure.
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Published Part B service records, 2022:
- 99211 — outpatient office visit: 176 service units.
- G0447 — Face-to-face behavioral counseling for obesity: 144 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2021 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2022). CPT notice
See the full table · Guide: How to read Medicare Part B data
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Published CMS data list 27 Medicare Part D prescriptions, including refills, in 2022.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2022. Published rows only; this is not a quality measure.
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Published Part D records, 2022:
- Losartan Potassium — 16 prescription fills, including refills.
- Levothyroxine Sodium — 11 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2022. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Medicare Part B services went from 7,370 in 2018 to 320 in 2022.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2018–2022.
Practice Location & Contact Primary Location
2971 W Algonquin Rd
Suite 103
Algonquin, IL 601029406
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $7,556 in 2022
The total amount Medicare approved for these services in 2022. 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, 2022.
Paid by Medicare
About $6,486 in 2022
The part of the Medicare-allowed amount that Medicare itself paid in 2022, 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, 2022.
30-day fills
57 standardized 30-day fills in 2022
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
$371 in 2022
The total cost of these prescriptions in 2022, 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, 2022.
Open Payments general payments, program year 2020
All general payments: $1,015.22 across 57 records.
By nature of payment
- Food and Beverage: $1,015.22 across 57 records.
Reporting-company totals (3 largest of 15)
- Boehringer Ingelheim Pharmaceuticals, Inc.: $166.38 across 9 records.
- GlaxoSmithKline, LLC.: $149.72 across 10 records.
- Amarin Pharma Inc.: $123.55 across 6 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 2020 (published June 30, 2026).
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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.
Compared with the same specialty in Algonquin and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Amsler are from 2022.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Amsler are from 2022.
7 active clinicians are listed under Internal Medicine with a practice address in Algonquin, IL (7,245 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
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 decreased 96% from 7,370 in 2018 to 320 in 2022.
- 2018: 7,370
- 2019: 5,922
- 2020: 4,021
- 2021: 756
- 2022: 320
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Medicare-allowed amount
Medicare-allowed amount decreased 98% from $327,152 in 2018 to $7,556 in 2022.
- 2018: $327,152
- 2019: $280,718
- 2020: $195,692
- 2021: $24,825
- 2022: $7,556
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Paid by Medicare
Paid by Medicare decreased 98% from $270,744 in 2018 to $6,486 in 2022.
- 2018: $270,744
- 2019: $231,144
- 2020: $164,845
- 2021: $19,239
- 2022: $6,486
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 100% from 7,697 in 2018 to 27 in 2022.
- 2018: 7,697
- 2019: 8,250
- 2020: 7,620
- 2021: 1,959
- 2022: 27
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30-day fills
30-day fills decreased 100% from 17,060 in 2018 to 57 in 2022.
- 2018: 17,060
- 2019: 18,211
- 2020: 17,722
- 2021: 4,446
- 2022: 57
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Part D drug cost
Part D drug cost decreased 100% from $452,645 in 2018 to $371 in 2022.
- 2018: $452,645
- 2019: $495,755
- 2020: $417,005
- 2021: $76,101
- 2022: $371
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Industry payments (Open Payments)
Industry payments (Open Payments) stayed about the same: $1,014.80 in 2019 and $1,015.22 in 2020.
- 2019: $1,014.80
- 2020: $1,015.22
Sources: CMS Medicare Physician & Other Practitioners (2022), CMS Medicare Part D Prescribers (2022), CMS Open Payments (2020), 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 2020 (payments made January 1 – December 31, 2020): 57 records totaling $1,015.22.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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JARDIANCE | General | $33.37 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
EVENITY | General | $27.05 |
| Amarin Pharma Inc. |
Food and Beverage
In-kind items and services
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Vascepa | General | $26.73 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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CHANTIX | General | $25.09 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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ANORO ELLIPTA | General | $24.84 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Ozempic | General | $24.02 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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CHANTIX | General | $23.97 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
JARDIANCE | General | $23.44 |
| Sunovion Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
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LONHALA MAGNAIR | General | $23.18 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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JARDIANCE | General | $23.16 |
| Sunovion Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
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LONHALA MAGNAIR | General | $22.31 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
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XARELTO | General | $22.04 |
| AbbVie Inc. |
Food and Beverage
In-kind items and services
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SYNTHROID | General | $21.89 |
| Amarin Pharma Inc. |
Food and Beverage
In-kind items and services
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Vascepa | General | $21.85 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
JARDIANCE | General | $21.75 |
| Amarin Pharma Inc. |
Food and Beverage
In-kind items and services
|
Vascepa | General | $21.46 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
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XARELTO | General | $20.63 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
Ozempic | General | $20.47 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
|
ANORO ELLIPTA | General | $20.47 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
Ozempic | General | $19.62 |
| Amarin Pharma Inc. |
Food and Beverage
In-kind items and services
|
Vascepa | General | $19.53 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
XARELTO | General | $19.39 |
| Astellas Pharma US Inc |
Food and Beverage
In-kind items and services
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MYRBETRIQ | General | $18.90 |
| Assertio Therapeutics, Inc. |
Food and Beverage
In-kind items and services
|
ZIPSOR | General | $18.84 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
EVENITY | General | $18.72 |
(top 25 shown)
Source: CMS Open Payments, program year 2020, 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 2016–2021 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, 2017–2022; 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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99211
Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional
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176 | 12 | $46.00 | $21.89 |
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G0447
Face-to-face behavioral counseling for obesity, 15 minutes
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144 | 12 | $65.00 | $25.72 |
Source: CMS Part B by Provider and Service, 2022; 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 2022.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Losartan Potassium | Losartan Potassium | 16 | 840 | $136.41 | — |
| Levothyroxine Sodium | Levothyroxine Sodium | 11 | 870 | $234.63 | — |
Source: CMS Part D by Provider and Drug, 2022; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2020-04-09NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
NUCC Taxonomy Code: 2083P0901X
Public health and general preventive medicine focuses on promoting health, preventing disease, and managing the health of communities and defined populations. These practitioners combine population-based public health skills with knowledge of primary, secondary, and tertiary prevention-oriented clinical practice in a wide variety of settings.
Additional State Medicaid & Healthcare Payer Identifiers
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 - Primary Care
ANPBC
Career & Practice History
NPI enumerated August 09, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Internal Medicine Providers in Algonquin
- Dr. Thomas Salvi, MD
- Dr. Arsenio Atadero, MD
- Dr. Madhu Gundavaram, MD
- Dr. Jeffrey Gindorf, MD
- Dr. Camelia Marian, MD
- Dr. Shahwar Syed, MD
Mailing Address
2971 W Algonquin Rd, Attn: K Boode Ste 103
Algonquin, IL 601029406
Phone: 8474581879