Cynthia Gerstenlauer , NP
Nurse Practitioner • Troy, MI
4600 Investment Dr, Suite 300
Troy, MI 480986365
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
-
Cynthia Gerstenlauer is listed in NPPES under Nurse Practitioner.
-
NPI assigned on March 28, 2007; this date does not establish years in practice.
-
Published CMS data list 6,734 Original Medicare Part B services in 2019.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2019. Published rows only; this is not a quality measure.
-
Published Part B service records, 2019:
- J0897 — Injection, denosumab, 1 mg: 6,064 service units.
- 99214 — Established patient outpatient office visit: 362 service units.
- 96372 — Injection of drug or substance under skin or into muscle: 110 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2019. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2018 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2019). CPT notice
See all 12 records in the table · Guide: How to read Medicare Part B data
-
Published CMS data list 460 Medicare Part D prescriptions, including refills, in 2020.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020. Published rows only; this is not a quality measure.
-
Published Part D records, 2020:
- Memantine Hcl — 151 prescription fills, including refills.
- Jardiance (Empagliflozin) — 53 prescription fills, including refills.
- Trulicity (Dulaglutide) — 38 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 14 records in the table · Guide: How to read Medicare Part D prescriber data
-
Medicare Part B services went from 8,294 in 2017 to 6,734 in 2019.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017–2019.
Practice Location & Contact Primary Location
4600 Investment Dr
Suite 300
Troy, MI 480986365
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
Nurse Practitioner: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
300 people with Original Medicare in 2019
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2019.
Medicare-allowed amount
About $152,978 in 2019
The total amount Medicare approved for these services in 2019. 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, 2019.
Paid by Medicare
About $119,759 in 2019
The part of the Medicare-allowed amount that Medicare itself paid in 2019, 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, 2019.
30-day fills
827 standardized 30-day fills in 2020
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
$175,857 in 2020
The total cost of these prescriptions in 2020, 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, 2020.
Open Payments general payments, program year 2025
All general payments: $834.49 across 10 records.
By nature of payment
- Food and Beverage: $834.49 across 10 records.
Reporting-company totals (3 largest of 9)
- Gilead Sciences, Inc.: $121.85 across 1 record.
- Eisai Inc.: $121.16 across 1 record.
- SUN PHARMACEUTICAL INDUSTRIES INC.: $116.60 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).
NPI first issued
2007
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, CMS release of October 2, 2026; 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, CMS release of October 2, 2026.
Compared with the same specialty in Troy and Michigan
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Cynthia Gerstenlauer are from 2019.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Cynthia Gerstenlauer are from 2020.
81 active clinicians are listed under Nurse Practitioner with a practice address in Troy, MI (3,598 in Michigan).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Troy
13.6% of these 81 clinicians have the CMS telehealth indicator.
45.7% of these 81 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.
-
Medicare Part B services
Medicare Part B services decreased 19% from 8,294 in 2017 to 6,734 in 2019.
- 2017: 8,294
- 2018: 6,856
- 2019: 6,734
-
Medicare-allowed amount
Medicare-allowed amount stayed about the same: $164,971 in 2017 and $152,978 in 2019.
- 2017: $164,971
- 2018: $145,570
- 2019: $152,978
-
Paid by Medicare
Paid by Medicare stayed about the same: $128,864 in 2017 and $119,759 in 2019.
- 2017: $128,864
- 2018: $114,380
- 2019: $119,759
-
Medicare Part D prescriptions
Medicare Part D prescriptions decreased 23% from 595 in 2016 to 460 in 2020.
- 2016: 595
- 2017: 749
- 2018: 738
- 2019: 902
- 2020: 460
-
30-day fills
30-day fills decreased 11% from 929 in 2016 to 827 in 2020.
- 2016: 929
- 2017: 1,271
- 2018: 1,294
- 2019: 1,554
- 2020: 827
-
Part D drug cost
Part D drug cost decreased 10% from $194,801 in 2016 to $175,857 in 2020.
- 2016: $194,801
- 2017: $358,719
- 2018: $363,605
- 2019: $331,399
- 2020: $175,857
-
Industry payments (Open Payments)
Industry payments (Open Payments) decreased 56% from $1,912.28 in 2021 to $834.49 in 2025.
- 2021: $1,912.28
- 2022: $660.06
- 2023: $194.25
- 2024: $256.99
- 2025: $834.49
Sources: CMS Medicare Physician & Other Practitioners (2019), CMS Medicare Part D Prescribers (2020), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS release of October 2, 2026, 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 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $834.49.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Gilead Sciences, Inc. |
Food and Beverage
In-kind items and services
|
Epclusa | General | $121.85 |
| Eisai Inc. |
Food and Beverage
Cash or cash equivalent
|
Leqembi | General | $121.16 |
| SUN PHARMACEUTICAL INDUSTRIES INC. |
Food and Beverage
In-kind items and services
|
— | General | $116.60 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
INTERSTIM | General | $112.18 |
| Teva Pharmaceuticals USA, Inc. |
Food and Beverage
In-kind items and services
|
AUSTEDO XR | General | $102.04 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
|
CAPVAXIVE | General | $71.68 |
| Otsuka America Pharmaceutical, Inc. |
Food and Beverage
In-kind items and services
|
REXULTI | General | $60.09 |
| Neurocrine BioSciences, Inc. |
Food and Beverage
In-kind items and services
|
INGREZZA | General | $49.02 |
| Neurocrine BioSciences, Inc. |
Food and Beverage
In-kind items and services
|
INGREZZA | General | $44.80 |
| Dexcom, Inc. |
Food and Beverage
In-kind items and services
|
Dexcom G6 Transmitter | General | $35.07 |
Source: CMS Open Payments, program year 2025, 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 2016–2018 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, 2017–2019; 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 |
|---|---|---|---|---|
|
J0897
Injection, denosumab, 1 mg
|
6,064 | 103 | $25.00 | $18.59 |
|
99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
|
362 | 271 | $179.61 | $94.69 |
|
96372
Injection of drug or substance under skin or into muscle
|
110 | 108 | $35.00 | $14.45 |
|
36415
Insertion of needle into vein for collection of blood sample
|
57 | 54 | $20.00 | $2.94 |
|
99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
|
31 | 29 | $126.29 | $64.93 |
|
83036
Hemoglobin a1c level
|
23 | 22 | $25.00 | $10.57 |
|
80053
Blood test, comprehensive group of blood chemicals
|
19 | 19 | $45.00 | $11.51 |
|
82306
Vitamin d-3 level
|
16 | 16 | $70.00 | $32.23 |
|
82607
Cyanocobalamin (vitamin b-12) level
|
15 | 15 | $25.00 | $16.41 |
|
80048
Blood test, basic group of blood chemicals (calcium, total)
|
13 | 12 | $35.00 | $9.21 |
|
90662
Influenza vaccine split virus, preservative free
|
12 | 12 | $65.00 | $54.67 |
|
G0008
Administration of influenza virus vaccine
|
12 | 12 | $35.00 | $16.73 |
Source: CMS Part B by Provider and Service, 2019; 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 2020.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Memantine Hcl | Memantine Hcl | 151 | 7,605 | $6,471.04 | 36 |
| Jardiance | Empagliflozin | 53 | 2,190 | $37,270.74 | 13 |
| Trulicity | Dulaglutide | 38 | 1,592 | $43,966.14 | — |
| Metformin Hcl | Metformin Hcl | 35 | 2,970 | $288.19 | 11 |
| Namzaric | Memantine Hcl/Donepezil Hcl | 26 | 780 | $13,397.58 | — |
| Ultra-Fine Nano Pen Needle | Pen Needle, Diabetic | 23 | 2,010 | $1,239.70 | 11 |
| Victoza 3-Pak | Liraglutide | 21 | 750 | $24,282.99 | — |
| Donepezil Hcl | Donepezil Hcl | 20 | 1,740 | $451.81 | — |
| Trintellix | Vortioxetine Hydrobromide | 20 | 600 | $7,827.68 | — |
| Escitalopram Oxalate | Escitalopram Oxalate | 19 | 1,470 | $431.25 | — |
| Lantus Solostar | Insulin Glargine,hum.Rec.Anlog | 17 | 1,638 | $12,952.73 | — |
| Alendronate Sodium | Alendronate Sodium | 13 | 364 | $62.76 | — |
| Ozempic | Semaglutide | 13 | 700 | $19,305.43 | — |
| Bydureon Pen | Exenatide Microspheres | 11 | 330 | $7,908.72 | — |
Source: CMS Part D by Provider and Drug, 2020; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC 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.
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.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated March 28, 2007.
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 November 2026.
NPI Administrative Meta
Other Nurse Practitioners in Troy
- Kristen Carlson
- Suman Sharma, NP
- Lucille Schneider, AGPCNP-BC
- Dr. Monica Quintana, DNP, RN, AGACNP-BC
- Renee Fadel, NP-C
- Ahmad Fawaz
Mailing Address
4600 Investment Dr, Suite 300
Troy, MI 480986365
Phone: 2482675000