Dr. John N Kersteff , MD
Internal Medicine โข Plainfield, IN
1100 Southfield Dr, Suite 1220
Plainfield, IN 461684498
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. John Kersteff is listed in NPPES under Internal Medicine.
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NPI assigned on September 15, 2005; this date does not establish years in practice.
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Published CMS data list 1,312 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: 478 service units.
- G0439 โ Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit: 277 service units.
- 99213 โ Established patient outpatient office visit: 115 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 14 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 12,447 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:
- Atorvastatin Calcium โ 675 prescription fills, including refills.
- Pantoprazole Sodium โ 415 prescription fills, including refills.
- Amlodipine Besylate โ 414 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 161 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 75% of clinicians listed under Internal Medicine in Indiana (2024, 1,298 clinicians with data). Median for this group: 619. Middle half: 289 to 1,188.
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 1,202 in 2020 to 1,312 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
1100 Southfield Dr
Suite 1220
Plainfield, IN 461684498
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: Hendricks County 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
Indiana University School Of Medicine
1993
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
349 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 $132,980 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 $104,488 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
30,068 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
$745,316 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: $51.43 across 2 records.
By nature of payment
- Food and Beverage: $51.43 across 2 records.
Reporting-company totals
- Abbott Laboratories: $32.63 across 1 record.
- Eli Lilly and Company: $18.80 across 1 record.
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
33 years (graduated 1993)
CMS Doctors and Clinicians data list 1993 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
2005
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.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
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)
Dr. Kersteff 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. Kersteff 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 Plainfield and Indiana
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 75% of clinicians listed under Internal Medicine in Indiana (2024, 1,298 clinicians with data). Median for this group: 619. Middle half: 289 to 1,188.
Too few clinicians listed under Internal Medicine in Plainfield have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 80% of clinicians listed under Internal Medicine in Indiana (2024, 1,298 clinicians with data). Median for this group: $58,493. Middle half: $29,161 to $106,046.
Too few clinicians listed under Internal Medicine in Plainfield have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 80% of clinicians listed under Internal Medicine in Indiana (2024, 1,298 clinicians with data). Median for this group: $44,734. Middle half: $22,318 to $82,444.
Too few clinicians listed under Internal Medicine in Plainfield have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 95% of clinicians listed under Internal Medicine in Plainfield, IN (2024, 11 clinicians with data). Median for this group: 3,807. Middle half: 1,245 to 6,910.
More Part D prescriptions than 90% of clinicians listed under Internal Medicine in Indiana (2024, 1,374 clinicians with data). Median for this group: 405. Middle half: 78 to 5,780.
Part D drug cost
A higher Part D drug cost than 90% of clinicians listed under Internal Medicine in Plainfield, IN (2024, 11 clinicians with data). Median for this group: $259,373. Middle half: $82,488 to $603,541.
A higher Part D drug cost than 80% of clinicians listed under Internal Medicine in Indiana (2024, 1,374 clinicians with data). Median for this group: $30,636. Middle half: $965 to $477,895.
12 active clinicians are listed under Internal Medicine with a practice address in Plainfield, IN (2,112 in Indiana).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Plainfield
8.3% of these 12 clinicians have the CMS telehealth indicator.
83.3% of these 12 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: 1,202 in 2020 and 1,312 in 2024.
- 2020: 1,202
- 2021: 1,269
- 2022: 1,487
- 2023: 1,334
- 2024: 1,312
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Medicare-allowed amount
Medicare-allowed amount increased 43% from $92,671 in 2020 to $132,980 in 2024.
- 2020: $92,671
- 2021: $116,821
- 2022: $143,005
- 2023: $133,055
- 2024: $132,980
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Paid by Medicare
Paid by Medicare increased 54% from $68,065 in 2020 to $104,488 in 2024.
- 2020: $68,065
- 2021: $86,349
- 2022: $108,788
- 2023: $103,383
- 2024: $104,488
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 20% from 10,379 in 2020 to 12,447 in 2024.
- 2020: 10,379
- 2021: 11,538
- 2022: 11,752
- 2023: 11,881
- 2024: 12,447
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30-day fills
30-day fills increased 27% from 23,585 in 2020 to 30,068 in 2024.
- 2020: 23,585
- 2021: 26,684
- 2022: 27,850
- 2023: 28,417
- 2024: 30,068
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Part D drug cost
Part D drug cost increased 15% from $646,800 in 2020 to $745,316 in 2024.
- 2020: $646,800
- 2021: $809,225
- 2022: $850,444
- 2023: $824,917
- 2024: $745,316
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $18.22 in 2021 to $51.43 in 2025.
- 2021: $18.22
- 2022: $205.09
- 2023: $14.25
- 2024: $82.49
- 2025: $51.43
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 $51.43.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Abbott Laboratories |
Food and Beverage
In-kind items and services
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CARDIOMEMS | General | $32.63 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $18.80 |
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 2016โ2023 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, 2017โ2024; 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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478 | 307 | $135.00 | $121.04 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
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277 | 277 | $157.00 | $124.01 |
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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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115 | 95 | $90.00 | $85.59 |
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G0008
Administration of influenza virus vaccine
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109 | 105 | $32.82 | $30.10 |
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90662
Influenza vaccine split virus, preservative free
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93 | 93 | $84.00 | $81.82 |
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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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79 | 70 | $26.00 | $15.73 |
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99490
Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month
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31 | 12 | $67.00 | $59.65 |
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99439
Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month
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30 | 11 | $60.00 | $45.51 |
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90677
Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use
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21 | 21 | $458.00 | $290.33 |
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G0009
Administration of pneumococcal vaccine
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21 | 21 | $49.00 | $30.10 |
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99495
Transitional care management services for problem of at least moderate complexity
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17 | 16 | $325.00 | $196.71 |
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93000
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
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15 | 14 | $46.00 | $13.44 |
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G0402
Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment
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15 | 15 | $215.00 | $158.88 |
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99496
Transitional care management services for problem of high complexity
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11 | 11 | $439.00 | $265.80 |
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 | 675 | 60,592 | $4,455.54 | 185 |
| Pantoprazole Sodium | Pantoprazole Sodium | 415 | 35,269 | $5,062.06 | 120 |
| Amlodipine Besylate | Amlodipine Besylate | 414 | 36,002 | $1,582.06 | 111 |
| Lisinopril | Lisinopril | 352 | 30,463 | $1,890.02 | 97 |
| Levothyroxine Sodium | Levothyroxine Sodium | 347 | 29,908 | $2,811.19 | 89 |
| Metoprolol Succinate | Metoprolol Succinate | 341 | 29,136 | $4,063.50 | 92 |
| Gabapentin | Gabapentin | 326 | 18,357 | $4,322.20 | 77 |
| Tamsulosin Hcl | Tamsulosin Hcl | 324 | 27,791 | $4,326.74 | 94 |
| Omeprazole | Omeprazole | 280 | 23,575 | $3,556.79 | 79 |
| Glimepiride | Glimepiride | 254 | 21,835 | $1,902.49 | 70 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 240 | 4,299 | $4,415.96 | 73 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 213 | 19,023 | $1,587.28 | 69 |
| Prednisone | Prednisone | 199 | 2,784 | $476.46 | 130 |
| Famotidine | Famotidine | 193 | 15,338 | $1,870.05 | 54 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 190 | 16,217 | $1,667.68 | 55 |
| Simvastatin | Simvastatin | 187 | 16,370 | $1,142.25 | 53 |
| Valsartan-Hydrochlorothiazide | Valsartan/Hydrochlorothiazide | 183 | 15,632 | $3,875.55 | 49 |
| Meloxicam | Meloxicam | 181 | 12,423 | $719.07 | 59 |
| Valsartan | Valsartan | 172 | 15,200 | $4,425.08 | 52 |
| Alprazolam | Alprazolam | 170 | 5,108 | $462.03 | 40 |
| Tramadol Hcl | Tramadol Hcl | 168 | 3,986 | $1,004.60 | 42 |
| Metformin Hcl | Metformin Hcl | 165 | 14,930 | $899.37 | 46 |
| Celecoxib | Celecoxib | 164 | 9,255 | $5,268.62 | 47 |
| Losartan Potassium | Losartan Potassium | 163 | 14,518 | $1,222.49 | 48 |
| Pravastatin Sodium | Pravastatin Sodium | 154 | 13,455 | $1,314.52 | 43 |
(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: 2021-03-05NUCC 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: 208000000X
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20060531000001
IN
5698786903
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
Hendricks County Hospital
1411 S Green St, Brownsburg, IN 461122048
Hendricks County Hospital
8244 E Us Hwy 36 1100, Avon, IN 461239627
Phone: 3172727500
Hendricks County Hospital
8244 E Us Hwy 36, Avon, IN 461239688
Hendricks County Hospital
1100 Southfield Dr, Plainfield, IN 461684499
Hendricks County Hospital
8244 E Us Hwy 36 1320, Avon, IN 461239688
Phone: 3172727519
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
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Nurse Practitioner
Nurse Practitioner
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Pediatrics (license number reported to NPPES: IN 01046710A)
NPI status registered as active in NPPES database
Registered at 1100 SOUTHFIELD DR, SUITE 1220, PLAINFIELD, IN 461684498 (Tel: 3178383443)
Registered at 1100 SOUTHFIELD DR, SUITE 1370, PLAINFIELD, IN 461684498 (Tel: 3178375571)
Recorded as JOHN KERSTEFF, M.D.
Internal Medicine (license number reported to NPPES: IN 01046710A)
Pediatrics (license number reported to NPPES: IN 01046710A)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Plainfield
- Dr. John Unison, MD
- Dr. Juan Mejia Garces, MD
- Dr. Audrey Abell, MD
- Dr. Katharina Weber, MD
- Dr. Linda Decesare, MD
- Dr. Sara Cook, MD
Mailing Address
1100 Southfield Dr, Suite 1370
Plainfield, IN 461684498
Phone: 3178375571