Dr. William Shaffer , MD
Internal Medicine • Bloomington, MN
7920 Old Cedar Ave S
Bloomington, MN 554251207
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. William Shaffer is listed in NPPES under Internal Medicine.
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NPI assigned on July 12, 2006; this date does not establish years in practice.
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Published CMS data list 716 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:
- 36415 — Insertion of needle into vein for collection of blood sample: 117 service units.
- 80048 — Blood test, basic group of blood chemicals (calcium, total): 88 service units.
- 85025 — Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count: 81 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 16 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 3,685 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 — 402 prescription fills, including refills.
- Amlodipine Besylate — 219 prescription fills, including refills.
- Metoprolol Succinate — 167 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 72 records in the table · Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 70% of clinicians listed under Internal Medicine in Bloomington, MN (2024, 18 clinicians with data). Median for this group: 1,126. Middle half: 592 to 2,041.
More Medicare Part B services than 70% of clinicians listed under Internal Medicine in Minnesota (2024, 1,537 clinicians with data). Median for this group: 378. Middle half: 183 to 716.
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 2,241 in 2020 to 716 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
7920 Old Cedar Ave S
Bloomington, MN 554251207
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 patients
147 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 $23,281 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 $16,231 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
9,572 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
$261,014 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 2021
All general payments: $256.90 across 3 records.
By nature of payment
- Travel and Lodging: $193.40 across 2 records.
- Food and Beverage: $63.50 across 1 record.
Reporting-company totals
- EMD Serono, Inc.: $256.90 across 3 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 2021 (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.
Enrolled in Medicare (PECOS)
Dr. Shaffer 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 Dr. Shaffer 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 Bloomington and Minnesota
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 70% of clinicians listed under Internal Medicine in Bloomington, MN (2024, 18 clinicians with data). Median for this group: 1,126. Middle half: 592 to 2,041.
More Medicare Part B services than 70% of clinicians listed under Internal Medicine in Minnesota (2024, 1,537 clinicians with data). Median for this group: 378. Middle half: 183 to 716.
Medicare-allowed amount
A lower Medicare-allowed amount than 80% of clinicians listed under Internal Medicine in Bloomington, MN (2024, 18 clinicians with data). Median for this group: $50,948. Middle half: $28,633 to $85,954.
A lower Medicare-allowed amount than 65% of clinicians listed under Internal Medicine in Minnesota (2024, 1,537 clinicians with data). Median for this group: $35,230. Middle half: $18,455 to $60,273.
Paid by Medicare
A lower Medicare payment amount than 75% of clinicians listed under Internal Medicine in Bloomington, MN (2024, 18 clinicians with data). Median for this group: $40,112. Middle half: $19,175 to $70,157.
A lower Medicare payment amount than 70% of clinicians listed under Internal Medicine in Minnesota (2024, 1,537 clinicians with data). Median for this group: $27,670. Middle half: $14,344 to $47,677.
Medicare Part D prescriptions
Fewer Part D prescriptions than 65% of clinicians listed under Internal Medicine in Bloomington, MN (2024, 17 clinicians with data). Median for this group: 5,358. Middle half: 3,093 to 8,838.
More Part D prescriptions than 75% of clinicians listed under Internal Medicine in Minnesota (2024, 1,476 clinicians with data). Median for this group: 276. Middle half: 78 to 3,478.
Part D drug cost
A lower Part D drug cost than 65% of clinicians listed under Internal Medicine in Bloomington, MN (2024, 17 clinicians with data). Median for this group: $342,572. Middle half: $243,842 to $565,705.
A higher Part D drug cost than 70% of clinicians listed under Internal Medicine in Minnesota (2024, 1,476 clinicians with data). Median for this group: $23,326. Middle half: $2,140 to $293,682.
39 active clinicians are listed under Internal Medicine with a practice address in Bloomington, MN (2,634 in Minnesota).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Bloomington
28.2% of these 39 clinicians have the CMS telehealth indicator.
41% of these 39 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 decreased 68% from 2,241 in 2020 to 716 in 2024.
- 2020: 2,241
- 2021: 2,487
- 2022: 2,595
- 2023: 2,196
- 2024: 716
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Medicare-allowed amount
Medicare-allowed amount decreased 62% from $60,685 in 2020 to $23,281 in 2024.
- 2020: $60,685
- 2021: $74,026
- 2022: $85,781
- 2023: $73,484
- 2024: $23,281
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Paid by Medicare
Paid by Medicare decreased 67% from $49,396 in 2020 to $16,231 in 2024.
- 2020: $49,396
- 2021: $59,875
- 2022: $71,624
- 2023: $60,232
- 2024: $16,231
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 31% from 5,334 in 2020 to 3,685 in 2024.
- 2020: 5,334
- 2021: 5,117
- 2022: 5,805
- 2023: 6,496
- 2024: 3,685
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30-day fills
30-day fills decreased 25% from 12,725 in 2020 to 9,572 in 2024.
- 2020: 12,725
- 2021: 12,719
- 2022: 14,192
- 2023: 15,822
- 2024: 9,572
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Part D drug cost
Part D drug cost varied from year to year: $264,361 in 2020 and $261,014 in 2024.
- 2020: $264,361
- 2021: $300,586
- 2022: $382,557
- 2023: $530,384
- 2024: $261,014
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $35.49 in 2019 to $256.90 in 2021.
- 2019: $35.49
- 2021: $256.90
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2021), 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 2021 (payments made January 1 – December 31, 2021): fewer than 11 records totaling $256.90.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| EMD Serono, Inc. |
Travel and Lodging
In-kind items and services
|
Mavenclad | General | $133.40 |
| EMD Serono, Inc. |
Food and Beverage
In-kind items and services
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Mavenclad | General | $63.50 |
| EMD Serono, Inc. |
Travel and Lodging
In-kind items and services
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Mavenclad | General | $60.00 |
Source: CMS Open Payments, program year 2021, 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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36415
Insertion of needle into vein for collection of blood sample
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117 | 96 | $17.00 | $8.50 |
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80048
Blood test, basic group of blood chemicals (calcium, total)
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88 | 81 | $39.90 | $8.29 |
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85025
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count
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81 | 72 | $36.80 | $7.52 |
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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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80 | 75 | $408.50 | $124.86 |
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84460
Liver enzyme (sgpt), level
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55 | 55 | $25.20 | $5.19 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
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42 | 42 | $413.90 | $126.43 |
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80061
Blood test, lipids (cholesterol and triglycerides)
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38 | 38 | $63.00 | $13.12 |
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G0103
Prostate cancer screening; prostate specific antigen test (psa)
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36 | 36 | $86.10 | $18.92 |
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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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35 | 33 | $288.90 | $85.24 |
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81003
Automated urinalysis test
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33 | 33 | $9.50 | $2.13 |
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83036
Hemoglobin a1c level
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30 | 30 | $45.20 | $9.25 |
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81001
Manual urinalysis test with examination using microscope, automated
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21 | 21 | $14.70 | $3.11 |
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82607
Cyanocobalamin (vitamin b-12) level
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20 | 20 | $70.40 | $14.78 |
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82043
Urine microalbumin (protein) level
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17 | 16 | $27.30 | $5.66 |
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84443
Blood test, thyroid stimulating hormone (tsh)
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12 | 12 | $78.80 | $16.46 |
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84153
Psa (prostate specific antigen) measurement, total
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11 | 11 | $86.10 | $18.02 |
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 | 402 | 34,216 | $6,380.79 | 146 |
| Amlodipine Besylate | Amlodipine Besylate | 219 | 18,244 | $2,080.82 | 81 |
| Metoprolol Succinate | Metoprolol Succinate | 167 | 13,815 | $4,117.79 | 62 |
| Levothyroxine Sodium | Levothyroxine Sodium | 163 | 13,184 | $2,669.59 | 56 |
| Omeprazole | Omeprazole | 161 | 13,367 | $2,674.22 | 62 |
| Lisinopril | Lisinopril | 150 | 12,574 | $1,792.48 | 53 |
| Metformin Hcl | Metformin Hcl | 108 | 8,264 | $1,664.16 | 41 |
| Terazosin Hcl | Terazosin Hcl | 102 | 8,018 | $2,886.31 | 39 |
| Tamsulosin Hcl | Tamsulosin Hcl | 86 | 7,536 | $1,791.66 | 37 |
| Losartan Potassium | Losartan Potassium | 84 | 7,070 | $1,067.88 | 38 |
| Triamterene-Hydrochlorothiazid | Triamterene/Hydrochlorothiazid | 81 | 6,820 | $1,204.00 | 33 |
| Glipizide Er | Glipizide | 81 | 6,025 | $2,138.88 | 32 |
| Metoprolol Tartrate | Metoprolol Tartrate | 77 | 6,554 | $948.31 | 31 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 77 | 6,900 | $1,397.90 | 26 |
| Famotidine | Famotidine | 75 | 6,500 | $1,591.66 | 34 |
| Clopidogrel | Clopidogrel Bisulfate | 72 | 6,480 | $1,099.88 | 29 |
| Eliquis | Apixaban | 72 | 5,644 | $104,086.04 | 30 |
| Gabapentin | Gabapentin | 61 | 5,052 | $1,674.29 | 30 |
| Furosemide | Furosemide | 57 | 4,754 | $509.39 | 29 |
| Allopurinol | Allopurinol | 56 | 4,980 | $979.32 | 21 |
| Potassium Chloride | Potassium Chloride | 53 | 4,276 | $2,214.32 | 20 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 53 | 1,555 | $1,915.05 | 24 |
| Warfarin Sodium | Warfarin Sodium | 51 | 3,830 | $1,429.45 | 20 |
| Torsemide | Torsemide | 50 | 3,546 | $868.08 | 19 |
| Trazodone Hcl | Trazodone Hcl | 49 | 3,464 | $678.29 | 17 |
(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: 2021-03-11NUCC 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.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20101130000812
MN
3971799149
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
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)
Otolaryngology
Doctor of Medicine (M.D.)
Social Worker - Clinical
Psychiatry & Neurology - Child & Adolescent Psychiatry
Doctor of Osteopathic Medicine (D.O.)
Family Medicine
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified), MPAS
Career & Practice History
NPI enumerated July 12, 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 Bloomington
- Dr. Cassandra Lall, MD
- Dr. Harry Fernandes, MD
- Dr. Bruce Burnett, MD, FACP
- Dr. Zhanna Kabanova, MD
- Dr. Bryan Labore, MD
- Dr. Matthew Riethof, MD
More public profiles in Minnesota
Directory navigation, in NPI number order.
- Aimee Abben, PA-C Physician Assistant · Saint Paul
- Evans Magambo, MD Emergency Medicine · Thief River Falls
- Amy Hawks, PT Physical Therapist · Saint Paul
- Gayathri Ravi, MD Internal Medicine - Hematology · Rochester
- Kimberly Woodland, NP Nurse Practitioner · Bemidji
- Kristin Dorn Physical Therapist · Vadnais Heights
- Victoria Othon, PsyD, LP Psychologist - Clinical · Hibbing
- Christopher Day, DPT Physical Therapist · Plymouth
- Jason Keszler, DO Radiology - Diagnostic Radiology · Eden Prairie
- Gang Zheng, MD, PhD Pathology - Anatomic Pathology & Clinical Pathology · Rochester
- John Krol, MD Radiology - Diagnostic Radiology · Edina
- Chad Cutshall, MD Anesthesiology · Minneapolis
Mailing Address
2925 Chicago Ave
Minneapolis, MN 554071321
Phone: 6122625000