Dr. Henry Jack Grainger, DO
- Medicare services, 2024
- 1,616
- Medicare patients, 2024
- 116
- Part D claims, 2024
- 9,073
- Industry payments
- $1,387
- Affiliated sites
- 7
- Practice address
- 897 Cypress Station Dr, Houston, TX 77090
- Practice phone
- Call (281) 453-7150
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Houston Medical ER
Houston, Texas
Find Dr. Grainger's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Henry Jack Grainger is an internist in Houston, Texas
Dr. Grainger practices at Houston Medical ER in Houston, Texas.
Dr. Grainger's NPI, 1306892005, was assigned on May 25, 2006. Dr. Grainger graduated from Kansas City University of Medicine and Biosciences College of Osteopathic Medicine in 1973. Dr. Grainger holds Texas license E1595.
- NPI
- 1306892005NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0446146898
- NPI enumeration date
- May 25, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (281) 453-7150
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 79
- Medical school graduation
- 1973
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Henry Jack Grainger practices at Houston Medical ER in Houston, Texas
Dr. Grainger's primary practice is Houston Medical ER, at 897 Cypress Station Dr, Houston, TX 77090 in Harris County. The practice phone is (281) 453-7150.
- Houston Medical ER897 Cypress Station Dr, Houston, TX 77090 · Harris CountyPhone(281) 453-7150
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Henry Jack Grainger is affiliated with 8 sites of care and 2 medical groups
Dr. Grainger's primary practice is Houston Medical ER in Houston, Texas. The medical group on file is 1960 Physician Associates. Dmand AI also links Dr. Grainger to 2 more physician offices, 2 group practices and clinics, 2 skilled nursing facilities, 1 hospice and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Henry Jack Grainger's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grainger practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Houston Medical ER | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Henry Jack Grainger is one of 8,437 internists in Texas
Internal medicine is Dr. Grainger's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Grainger is board certified in internal medicine by the American Board of Internal Medicine. Dr. Grainger is licensed in Texas.
Specialties and state licenses
- Internal medicine, TexasPrimary
Clinical focus
Dmand AI lists acute sinusitis, acute skin infection, arthritis, asthma, chronic anemia, chronic diabetes, chronic hypertension and chronic kidney disease among the conditions Dr. Grainger treats.
Internists near Dr. Grainger
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Henry Jack Grainger billed Medicare for 1,616 services in 2024
CMS data shows 1,616 Medicare services from Dr. Grainger across 13 procedure codes in 2024, for 116 Medicare patients. Medicare paid $160,971 for them.
Dr. Grainger's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,1692024: 1,36016%
- Drugs given in the office
- 2023: 762024: 14287%
- Other services
- 2023: 822024: 6224%
- Tests and treatments
- 2023: 352024: 5249%
Where Dr. Grainger's Medicare services took place, 2024
- In an office40525%
- In a facility1,21175%
Dr. Grainger compared with the Texas median for internists, 2024
- Dr. Grainger
- Texas median
- Medicare services
- 1,616vs 5393.0 times
- Medicare patients
- 116vs 19039% below
- Part D claims
- 8,347vs 28928.9 times
Medians across 7,794 internists in Texas with Dmand AI profiles that report each measure.
Dr. Grainger's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Grainger?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Grainger and other internists in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Henry Jack Grainger treated 116 Medicare patients in 2024, average age 73
CMS counts 116 Medicare patients who saw Dr. Grainger in 2024. The largest group is 65 to 74, with 49 patients. 75% of them have high blood pressure, and 72% have high cholesterol. 67% are also on Medicaid. Their average risk score is 2.52, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Grainger's median patient age at 70, with 54% women.
Dr. Grainger's Medicare patients by age, 2024
Dr. Grainger's Medicare patients by sex, 2024
- Women6153%
- Men5547%
Chronic conditions among Dr. Grainger's Medicare patients, 2024
- High blood pressure75%
- High cholesterol72%
- Diabetes53%
- Arthritis51%
- Mood disorders36%
- Ischemic heart disease34%
- Alzheimer's and dementia33%
- Chronic kidney disease33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Grainger's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Henry Jack Grainger wrote 9,073 Medicare Part D claims in 2024
In 2024, Dr. Grainger wrote 9,073 Medicare Part D claims for 463 patients. 87% of them were for generic drugs. CMS names the drug for 8,347 of them, across 155 drugs with 11 or more claims each, at $554,692 in total drug cost. In 2023, CMS named 8,405 claims across 156 drugs.
Dr. Grainger's Part D claims by kind of drug, 2024
- Generic7,922 claims87%
- Brand-name1,115 claims12%
- Other36 claims0%
Dr. Grainger's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Grainger's Part D claims, 2024
- Opioids2%214 of 9,073 claims
- Antibiotics3%294 of 9,073 claims
- Antipsychotics, patients 65 and over1%107 of 9,073 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 8,4052024: 8,3471%
Drugs named by CMS: 155 in 2024, 156 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Henry Jack Grainger takes part in Medicare
Dr. Grainger accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Henry Jack Grainger received $1,387 in industry payments from 2016 to 2025
CMS Open Payments shows 91 general payments to Dr. Grainger from 24 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $373.
General payments to Dr. Grainger by program year, 2016 to 2025
General payments to Dr. Grainger by kind, 2016 to 2025
- Food and beverage$1,386100%
- Education$20%
Companies that paid Dr. Grainger the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Henry Jack Grainger has 1 award and honors on record
Dmand AI lists 1 award for Dr. Grainger, most recently Regional Top Doctor in 2014.
Awards and honors for Dr. Grainger
- 2014
- Regional Top Doctor
Source: Dmand AI Professional Profile Data
Dr. Henry Jack Grainger graduated from Kansas City University of Medicine and Biosciences College of Osteopathic Medicine
Dr. Grainger graduated from Kansas City University of Medicine and Biosciences College of Osteopathic Medicine in 1973.
- Medical school
- Board certified in internal medicine
- Board certified in 2001 - 2025
- Board certified in 1973 - 1975
- Board certified in 1973 - 2025
Source: Dmand AI Professional Profile Data
Dr. Henry Jack Grainger accepts plans from 23 insurance carriers
Dr. Grainger is in network with 23 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 14. Check the plan with the practice before a visit.
- Elevance
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Cigna
- HCSC
- Humana
- Alliant Health Plans
- +15 more carriersWith a free account
Plan types Dr. Grainger accepts, by number of carriers
- PPO14
- HMO13
- Medicare11
- POS6
- EPO4
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Henry Jack Grainger's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Henry Jack Grainger
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Henry Jack Grainger's NPI number?
Dr. Henry Jack Grainger's NPI number is 1306892005. It was assigned on May 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Henry Jack Grainger?
Dr. Henry Jack Grainger is an internist in Houston, Texas. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Henry Jack Grainger practice?
Dr. Grainger practices at 897 Cypress Station Dr, Houston, TX 77090. Dr. Grainger's primary practice is Houston Medical ER in Houston, Texas. Dmand AI also links Dr. Grainger to 2 physician offices, 2 group practices and clinics, 2 skilled nursing facilities, 1 hospice and 1 medical group.
What is Dr. Henry Jack Grainger's office phone number?
The practice phone on file for Dr. Grainger is (281) 453-7150.
What is Dr. Henry Jack Grainger's medical license number?
Dr. Grainger holds Texas license E1595.
What medical group is Dr. Henry Jack Grainger part of?
Dr. Grainger is linked to 1960 Physician Associates. Dmand AI links Dr. Grainger to 1 more medical group.
Does Dr. Henry Jack Grainger accept Medicare?
Yes. CMS data shows Dr. Grainger billed Medicare for 1,616 services in 2024, and Dr. Grainger accepts Medicare assignment.
How many Medicare patients does Dr. Henry Jack Grainger see?
CMS counts 116 Medicare patients who saw Dr. Grainger in 2024, with an average age of 73.
Is Dr. Henry Jack Grainger board certified?
Yes. Dr. Grainger is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Henry Jack Grainger bill to Medicare?
In 2024, Dr. Grainger's most billed Medicare services were nursing facility care (99310), office visit, established patient (99214) and injected or infused drug (J1100).
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Where did Dr. Henry Jack Grainger go to medical school?
Dr. Grainger graduated from Kansas City University of Medicine and Biosciences College of Osteopathic Medicine in 1973.
What drugs does Dr. Henry Jack Grainger prescribe most?
In 2024 Medicare Part D data, Dr. Grainger's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Fluticasone Propionate.
Has Dr. Henry Jack Grainger received payments from drug or device companies?
CMS Open Payments shows $1,387 in general payments to Dr. Grainger from 24 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Henry Jack Grainger been practicing?
Dr. Grainger graduated from medical school in 1973, 53 years ago.
What insurance does Dr. Henry Jack Grainger accept?
Dr. Grainger is in network with 23 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 14. Check the plan with the practice before a visit.
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