Dr. John J Nemecek , MD
General Practice • Houston, TX
1415 California St
Houston, TX 770062602
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 October 20, 2006; this date does not establish years in practice.
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Published CMS data list 4,470 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:
- Biktarvy (Bictegrav/Emtricit/Tenofov Ala) — 794 prescription fills, including refills.
- Atorvastatin Calcium — 339 prescription fills, including refills.
- Tivicay (Dolutegravir Sodium) — 297 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 75 records in the table · Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 85% of clinicians listed under General Practice in Houston, TX (2024, 36 clinicians with data). Median for this group: 577. Middle half: 85 to 2,785.
More Part D prescriptions than 80% of clinicians listed under General Practice in Texas (2024, 221 clinicians with data). Median for this group: 452. Middle half: 78 to 2,858.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 4,636 in 2020 to 4,470 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020–2024.
Practice Location & Contact Primary Location
1415 California St
Houston, TX 770062602
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: Legacy Community Health Services, 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
Southern Illinois University School Of Medicine
1981
What Public CMS Data Show
General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
6,188 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
$6,995,534 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.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $122.27 in 2021
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2021.
Years since graduation
45 years (graduated 1981)
CMS Doctors and Clinicians data list 1981 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
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.
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, “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. Nemecek 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. Nemecek 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 Houston and Texas
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 85% of clinicians listed under General Practice in Houston, TX (2024, 36 clinicians with data). Median for this group: 577. Middle half: 85 to 2,785.
More Part D prescriptions than 80% of clinicians listed under General Practice in Texas (2024, 221 clinicians with data). Median for this group: 452. Middle half: 78 to 2,858.
Part D drug cost
A higher Part D drug cost than 95% of clinicians listed under General Practice in Houston, TX (2024, 36 clinicians with data). Median for this group: $20,647. Middle half: $2,458 to $392,192.
A higher Part D drug cost than 95% of clinicians listed under General Practice in Texas (2024, 221 clinicians with data). Median for this group: $17,804. Middle half: $993 to $222,529.
133 active clinicians are listed under General Practice with a practice address in Houston, TX (1,066 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Houston
6.8% of these 133 clinicians have the CMS telehealth indicator.
30.1% of these 133 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 D prescriptions
Medicare Part D prescriptions stayed about the same: 4,636 in 2020 and 4,470 in 2024.
- 2020: 4,636
- 2021: 4,644
- 2022: 5,000
- 2023: 4,513
- 2024: 4,470
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30-day fills
30-day fills stayed about the same: 6,489 in 2020 and 6,188 in 2024.
- 2020: 6,489
- 2021: 6,059
- 2022: 6,471
- 2023: 6,273
- 2024: 6,188
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Part D drug cost
Part D drug cost increased 11% from $6,309,276 in 2020 to $6,995,534 in 2024.
- 2020: $6,309,276
- 2021: $6,614,396
- 2022: $6,928,313
- 2023: $7,157,485
- 2024: $6,995,534
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Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2021 only.
Sources: 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 $122.27.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ViiV Healthcare Company |
Food and Beverage
In-kind items and services
|
CABENUVA | General | $122.27 |
Source: CMS Open Payments, program year 2021, released June 30, 2026.
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 |
|---|---|---|---|---|---|
| Biktarvy | Bictegrav/Emtricit/Tenofov Ala | 794 | 24,050 | $3,101,343.55 | 90 |
| Atorvastatin Calcium | Atorvastatin Calcium | 339 | 21,386 | $2,048.95 | 78 |
| Tivicay | Dolutegravir Sodium | 297 | 8,910 | $683,706.72 | 34 |
| Descovy | Emtricitabine/Tenofov Alafenam | 231 | 6,930 | $497,257.76 | 27 |
| Genvoya | Elviteg/Cob/Emtri/Tenof Alafen | 170 | 5,100 | $646,988.47 | 15 |
| Lisinopril | Lisinopril | 154 | 9,900 | $674.41 | 37 |
| Symtuza | Darunavir/Cob/Emtri/Tenof Alaf | 126 | 4,020 | $618,008.98 | 15 |
| Prezcobix | Darunavir/Cobicistat | 119 | 3,570 | $288,687.52 | 17 |
| Losartan Potassium | Losartan Potassium | 107 | 6,150 | $523.08 | 24 |
| Amlodipine Besylate | Amlodipine Besylate | 106 | 7,424 | $514.51 | 24 |
| Juluca | Dolutegravir/Rilpivirine | 92 | 2,760 | $328,078.29 | — |
| Triumeq | Abacavir/Dolutegravir/Lamivudi | 88 | 2,640 | $320,067.21 | 11 |
| Hydrochlorothiazide | Hydrochlorothiazide | 85 | 5,130 | $252.29 | 21 |
| Ritonavir | Ritonavir | 82 | 2,520 | $10,735.72 | — |
| Metformin Hcl | Metformin Hcl | 79 | 4,660 | $497.67 | 19 |
| Valacyclovir | Valacyclovir Hcl | 77 | 3,477 | $2,901.77 | 13 |
| Gabapentin | Gabapentin | 68 | 2,220 | $1,210.09 | — |
| Tamsulosin Hcl | Tamsulosin Hcl | 61 | 3,150 | $363.43 | 13 |
| Isentress | Raltegravir Potassium | 51 | 1,530 | $106,911.37 | — |
| Zolpidem Tartrate | Zolpidem Tartrate | 49 | 1,470 | $203.33 | — |
| Escitalopram Oxalate | Escitalopram Oxalate | 46 | 1,830 | $209.45 | — |
| Levothyroxine Sodium | Levothyroxine Sodium | 46 | 3,050 | $298.62 | 11 |
| Pantoprazole Sodium | Pantoprazole Sodium | 46 | 2,384 | $261.18 | 12 |
| Trazodone Hcl | Trazodone Hcl | 43 | 1,290 | $226.70 | — |
| Sulfamethoxazole-Trimethoprim | Sulfamethoxazole/Trimethoprim | 43 | 1,611 | $179.35 | 12 |
(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
NUCC Taxonomy Code: 208D00000X
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
NUCC Taxonomy Code: 171W00000X
A person who contracts to supply certain materials or do certain work for a stipulated sum; esp., one whose business is contracting work in any of the building trades. For purposes of the taxonomy, a person who contracts to complete home repairs or modifications to accommodate a health condition (e.g. wheelchair ramp, kitchen counter lowering).
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - GENERAL PRACTICE
I20041026000060
TX
5799746442
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
Legacy Community Health Services, Inc
6441 High Star Dr, Houston, TX 770745005
Phone: 8325485300
Legacy Community Health Services, Inc
1415 California St, Houston, TX 770062602
Phone: 8325485100
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 - Family
Master of Science in Nursing, Registered Nurse, Advanced Practice Registered Nurse, Family Nurse Practitioner (Certified)
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.)
Psychiatry & Neurology - Psychiatry
Doctor of Osteopathic Medicine (D.O.)
Psychiatry & Neurology - Addiction Psychiatry
Doctor of Medicine (M.D.), Master of Arts
Pediatrics
Doctor of Medicine (M.D.)
Internal Medicine - Infectious Disease
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated October 20, 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 General Practices in Houston
- Dr. Samuel Mackoff, MD
- Dr. Azim Karim, MD
- Dr. Puja Gandhi, MD, MPH
- Dr. Manuel Garcia Galdo, MD
- Dr. Stephen Vanroekel, DO
- Dr. Zsolt Garami, MD
Mailing Address
Po Box 66308
Houston, TX 772666308
Phone: 8325485000