Dr. Henry Jack Grainger , DO
Internal Medicine • Houston, TX
511a W Tidwell Rd
Houston, TX 770914338
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. Henry Grainger is listed in NPPES under Internal Medicine.
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NPI assigned on May 25, 2006; this date does not establish years in practice.
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Published CMS data list 1,616 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:
- 99310 — Subsequent nursing facility care with high level of medical decision making, per day: 1,117 service units.
- 99214 — Established patient outpatient office visit: 114 service units.
- J1100 — Injection, dexamethasone sodium phosphate, 1 mg: 112 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 13 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 8,347 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 — 568 prescription fills, including refills.
- Amlodipine Besylate — 347 prescription fills, including refills.
- Fluticasone Propionate — 261 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 155 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 85% of clinicians listed under Internal Medicine in Houston, TX (2024, 792 clinicians with data). Median for this group: 424. Middle half: 168 to 965.
More Medicare Part B services than 75% of clinicians listed under Internal Medicine in Texas (2024, 5,423 clinicians with data). Median for this group: 645. Middle half: 277 to 1,322.
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 668 in 2020 to 1,616 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
511a W Tidwell Rd
Houston, TX 770914338
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: 1960 Physician Associates. 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
1973
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
116 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 $208,604 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 $160,969 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
13,169 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
$554,692 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 2025
All general payments: $60.74 across 3 records.
By nature of payment
- Food and Beverage: $60.74 across 3 records.
Reporting-company totals
- Novo Nordisk Inc: $37.81 across 2 records.
- Exact Sciences Corporation: $22.93 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
53 years (graduated 1973)
CMS Doctors and Clinicians data list 1973 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. Grainger 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. Grainger 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 B services
More Medicare Part B services than 85% of clinicians listed under Internal Medicine in Houston, TX (2024, 792 clinicians with data). Median for this group: 424. Middle half: 168 to 965.
More Medicare Part B services than 75% of clinicians listed under Internal Medicine in Texas (2024, 5,423 clinicians with data). Median for this group: 645. Middle half: 277 to 1,322.
Medicare-allowed amount
A higher Medicare-allowed amount than 90% of clinicians listed under Internal Medicine in Houston, TX (2024, 792 clinicians with data). Median for this group: $45,451. Middle half: $17,793 to $90,454.
A higher Medicare-allowed amount than 90% of clinicians listed under Internal Medicine in Texas (2024, 5,423 clinicians with data). Median for this group: $61,221. Middle half: $27,420 to $115,826.
Paid by Medicare
A higher Medicare payment amount than 90% of clinicians listed under Internal Medicine in Houston, TX (2024, 792 clinicians with data). Median for this group: $35,151. Middle half: $13,649 to $70,525.
A higher Medicare payment amount than 90% of clinicians listed under Internal Medicine in Texas (2024, 5,423 clinicians with data). Median for this group: $47,501. Middle half: $20,446 to $90,051.
Medicare Part D prescriptions
More Part D prescriptions than 90% of clinicians listed under Internal Medicine in Houston, TX (2024, 826 clinicians with data). Median for this group: 877. Middle half: 121 to 4,265.
More Part D prescriptions than 85% of clinicians listed under Internal Medicine in Texas (2024, 5,674 clinicians with data). Median for this group: 828. Middle half: 121 to 4,824.
Part D drug cost
A higher Part D drug cost than 80% of clinicians listed under Internal Medicine in Houston, TX (2024, 826 clinicians with data). Median for this group: $119,398. Middle half: $7,661 to $420,598.
A higher Part D drug cost than 80% of clinicians listed under Internal Medicine in Texas (2024, 5,674 clinicians with data). Median for this group: $64,859. Middle half: $4,211 to $436,775.
1,488 active clinicians are listed under Internal Medicine with a practice address in Houston, TX (9,191 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Houston
21.8% of these 1,488 clinicians have the CMS telehealth indicator.
61.6% of these 1,488 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 increased 142% from 668 in 2020 to 1,616 in 2024.
- 2020: 668
- 2021: 583
- 2022: 1,172
- 2023: 1,362
- 2024: 1,616
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Medicare-allowed amount
Medicare-allowed amount increased 193% from $71,259 in 2020 to $208,604 in 2024.
- 2020: $71,259
- 2021: $68,262
- 2022: $127,093
- 2023: $181,692
- 2024: $208,604
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Paid by Medicare
Paid by Medicare increased 195% from $54,630 in 2020 to $160,969 in 2024.
- 2020: $54,630
- 2021: $52,842
- 2022: $98,602
- 2023: $141,427
- 2024: $160,969
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Medicare Part D prescriptions
Medicare Part D prescriptions varied from year to year: 8,618 in 2020 and 8,347 in 2024.
- 2020: 8,618
- 2021: 6,883
- 2022: 6,724
- 2023: 8,405
- 2024: 8,347
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30-day fills
30-day fills decreased 15% from 15,545 in 2020 to 13,169 in 2024.
- 2020: 15,545
- 2021: 12,503
- 2022: 10,983
- 2023: 13,015
- 2024: 13,169
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Part D drug cost
Part D drug cost increased 18% from $470,791 in 2020 to $554,692 in 2024.
- 2020: $470,791
- 2021: $344,798
- 2022: $368,317
- 2023: $555,541
- 2024: $554,692
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $33.15 in 2021 to $60.74 in 2025.
- 2021: $33.15
- 2022: $72.74
- 2023: $232.25
- 2024: $88.57
- 2025: $60.74
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 · 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 $60.74.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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Cologuard Collection Kit | General | $22.93 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Ozempic | General | $19.26 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Wegovy | General | $18.55 |
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 2016–2023 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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99310
Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes
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1,117 | 52 | $203.00 | $153.73 |
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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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114 | 45 | $632.46 | $129.04 |
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J1100
Injection, dexamethasone sodium phosphate, 1 mg
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112 | 19 | $5.00 | $0.11 |
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96372
Injection of drug or substance under skin or into muscle
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52 | 20 | $73.00 | $14.31 |
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99306
Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more
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41 | 32 | $235.00 | $181.65 |
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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 | 26 | $452.83 | $90.09 |
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99309
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes
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30 | 22 | $167.00 | $107.64 |
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J0696
Injection, ceftriaxone sodium, per 250 mg
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30 | 14 | $25.00 | $0.45 |
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99316
Nursing facility discharge management, more than 30 minutes
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23 | 21 | $192.00 | $130.49 |
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G0182
Physician supervision of a patient under a medicare-approved hospice (patient not present) requiring complex and multidisciplinary care modalities involving regular physician development and/or revision of care plans, review of subsequent reports of patien
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19 | 13 | $156.00 | $104.64 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
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16 | 16 | $596.06 | $130.07 |
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G0442
Annual alcohol misuse screening, 5 to 15 minutes
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14 | 14 | $70.00 | $18.76 |
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G0444
Annual depression screening, 5 to 15 minutes
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13 | 13 | $70.00 | $18.78 |
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 | 568 | 35,027 | $6,846.59 | 164 |
| Amlodipine Besylate | Amlodipine Besylate | 347 | 21,842 | $3,138.69 | 107 |
| Fluticasone Propionate | Fluticasone Propionate | 261 | 9,816 | $3,327.03 | 117 |
| Gabapentin | Gabapentin | 245 | 10,055 | $5,066.16 | 59 |
| Levothyroxine Sodium | Levothyroxine Sodium | 212 | 10,432 | $3,577.38 | 55 |
| Lisinopril | Lisinopril | 188 | 9,735 | $2,143.61 | 48 |
| Losartan Potassium | Losartan Potassium | 176 | 10,830 | $1,832.96 | 52 |
| Pantoprazole Sodium | Pantoprazole Sodium | 172 | 7,893 | $2,601.05 | 39 |
| Tamsulosin Hcl | Tamsulosin Hcl | 164 | 8,357 | $2,868.90 | 40 |
| Furosemide | Furosemide | 155 | 7,598 | $976.51 | 52 |
| Eliquis | Apixaban | 151 | 3,373 | $69,295.07 | 25 |
| Metformin Hcl | Metformin Hcl | 150 | 11,060 | $1,380.78 | 55 |
| Acetaminophen-Codeine | Acetaminophen With Codeine | 146 | 3,196 | $1,240.32 | 53 |
| Clopidogrel | Clopidogrel Bisulfate | 143 | 7,604 | $1,712.93 | 40 |
| Trazodone Hcl | Trazodone Hcl | 133 | 4,168 | $1,950.30 | 27 |
| Nifedipine Er | Nifedipine | 121 | 6,317 | $3,463.08 | 25 |
| Amoxicillin | Amoxicillin | 119 | 1,139 | $287.72 | 67 |
| Farxiga | Dapagliflozin Propanediol | 118 | 3,198 | $62,697.08 | 18 |
| Clonidine Hcl | Clonidine Hcl | 115 | 5,549 | $789.15 | 49 |
| Metoprolol Succinate | Metoprolol Succinate | 112 | 6,956 | $1,713.26 | 31 |
| Tizanidine Hcl | Tizanidine Hcl | 111 | 3,580 | $1,213.75 | 47 |
| Carvedilol | Carvedilol | 105 | 5,911 | $1,193.75 | 32 |
| Omeprazole | Omeprazole | 105 | 5,452 | $1,500.71 | 33 |
| Metoprolol Tartrate | Metoprolol Tartrate | 104 | 5,688 | $1,064.75 | 29 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 93 | 3,891 | $2,769.09 | 40 |
(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: 2021-04-12NUCC 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: 207RC0000X
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
NUCC Taxonomy Code: 207RG0300X
An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20040224000823
TX
0446146898
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
1960 Physician Associates
5039 Fm 2920 Rd, Spring, TX 773883114
Phone: 2815863888
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
General Practice
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Nurse Practitioner - Adult Health
Adult Nurse Practitioner
Career & Practice History
NPI enumerated May 25, 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 Houston
- Dr. Arjun Jogimahanti, MD
- Dr. Benjamin Clark, MD
- Dr. Michele Gocuay, MD
- Dr. Stacy Moulder, MD
- Dr. Alfred Paz, DO
- Dr. Cristina Murdock, MD
Mailing Address
511a W Tidwell Rd
Houston, TX 770914338
Phone: 7136949709