Medicare Enrolled
Dr. Thomas Gribbin, M.D.
Hematology & Oncology · Grand Rapids, MI
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Gribbin from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Gribbin
Dr. Thomas Gribbin is a hematology & oncology specialist in Grand Rapids, MI, with 21 years of NPI registration. Based on federal Medicare data, Dr. Gribbin performed 3,284 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Gribbin received a total of $1,083 from 20 pharmaceutical and/or device companies across 38 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Gribbin is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 21 years of NPI registration
▲ Top 24% volume in MI
$1,083 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗3,284
Medicare services
Top 24% in MI for hematology & oncology
Not available
Unique patients (not deduplicated)
$29
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
978 | $0 | $1 |
| Anti-nausea injection (Aloxi/palonosetron) | 490 | $1 | $30 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
254 | $88 | $189 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
213 | $91 | $295 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
184 | $10 | $36 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
173 | $62 | $133 |
| Zoledronic acid injection, 1 mg An injection of zoledronic acid administered at a dose of 1 mg. |
168 | $6 | $25 |
| Enhanced Oncology Model monthly payment This code represents the monthly enhanced oncology services payment under the Enhancing Oncology Model. It covers the administrative payment for enhanced services provided to eligible patients. |
112 | $73 | $70 |
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
100 | $92 | $180 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
74 | $8 | $14 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
74 | $114 | $264 |
| Complete blood count (CBC) with differential An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells. |
63 | $7 | $26 |
| Drug injection, under skin or into muscle A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle. |
58 | $10 | $38 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
51 | $10 | $35 |
| Blood or blood product transfusion The administration of whole blood or specific blood components into a patient's bloodstream. |
48 | $26 | $95 |
| Intravenous infusion, 1 hour or less Administration of medication or fluid directly into a vein for therapeutic, preventive, or diagnostic purposes. The procedure lasts one hour or less. |
38 | $47 | $151 |
| Intravenous infusion of new drug or substance, 1 hour or less This procedure involves administering a new medication or substance directly into a vein through an existing access site. The infusion is completed within one hour or less. |
36 | $42 | $150 |
| Normal saline infusion, 1000 cc Administration of 1000 cc of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater solution. |
34 | $2 | $4 |
| New patient office visit, complex (60-74 min) | 28 | $156 | $324 |
| Intravenous drug injection A procedure involving the administration of a medication or substance directly into a vein. |
27 | $22 | $83 |
| Intravenous hydration infusion, 31-60 minutes Administration of fluids into a vein to maintain hydration. This procedure involves an infusion lasting between 31 and 60 minutes. |
26 | $22 | $90 |
| Additional hour of intravenous hydration This code represents each additional hour of intravenous fluid administration beyond the initial hour. It is used to bill for extended hydration therapy. |
23 | $8 | $28 |
| Additional sequential IV infusion, 1 hour or less This code represents an additional intravenous infusion administered sequentially to a primary infusion. It covers the administration time of one hour or less. |
19 | $19 | $66 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
13 | $128 | $304 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. These counts do not measure clinical quality or years of experience.
12.6% high complexity
58.0% medium
29.4% routine
Industry Payment Transparency
Open Payments through 2024 ↗$1,083
Total received (2018-2024)
Avg $155/year across 7 years
Bottom 45% in MI for hematology & oncology
20
Companies
38
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$285
2023
$209
2022
$75
2021
$12
2020
$21
2019
$261
2018
$221
Payments by company (2024)
GlaxoSmithKline, LLC.
$39
Regeneron Healthcare Solutions, Inc.
$37
Amneal Pharmaceuticals LLC
$29
Novartis Pharmaceuticals Corporation
$24
Merck Sharp & Dohme LLC
$24
Stemline Therapeutics Inc.
$22
ARRAY BIOPHARMA INC
$21
PharmaEssentia USA Corporation
$20
AstraZeneca Pharmaceuticals LP
$20
Celgene Corporation
$18
PFIZER INC.
$16
ABBVIE INC.
$15
Top 3 companies account for 36.8% of 2024 payments
All-time payments by company (2018-2024) ›
Gilead Sciences, Inc.
$212
Foundation Medicine, Inc.
$149
PFIZER INC.
$127
AstraZeneca Pharmaceuticals LP
$107
Merck Sharp & Dohme LLC
$92
Pharmacyclics LLC, an AbbVie Company
$49
GlaxoSmithKline, LLC.
$39
Regeneron Healthcare Solutions, Inc.
$37
ABBVIE INC.
$37
Amneal Pharmaceuticals LLC
$29
E.R. Squibb & Sons, L.L.C.
$25
Novartis Pharmaceuticals Corporation
$24
Lilly USA, LLC
$24
Stemline Therapeutics Inc.
$22
ARRAY BIOPHARMA INC
$21
Adaptive Biotechnologies Corporation
$21
PharmaEssentia USA Corporation
$20
Celgene Corporation
$18
Pharmacyclics LLC, An AbbVie Company
$18
Kyowa Kirin, Inc.
$13
Top 3 companies account for 45.1% of all-time payments
Associated products mentioned in payments ›
AVASTIN · BESREMI · BOSULIF · BRAFTOVI · EPKINLY · FOUNDATIONONE · IBRANCE · IMBRUVICA · KEYTRUDA · KISQALI · LIBTAYO · OJJAARA · ONGLYZA · OPDIVO · Orserdu · POTELIGEO · REBLOZYL · TAGRISSO · Trodelvy · VENCLEXTA · VERZENIO · Zydelig · clonoSEQ
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Geographic Context
Hematology & oncology specialists in nearby ZIP areas
23
County median income
$80,390
Nearest hospital to ZIP centroid (approximate)
SPECTRUM HEALTH
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Gribbin is a clinical cardiology specialist, with above-average Medicare volume (top 24% in MI), with 21 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Gribbin experienced with dexamethasone injection (steroid)?
Based on Medicare claims data, Dr. Gribbin performed 978 dexamethasone injection (steroid) services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Gribbin receive payments from pharmaceutical companies?
Yes. Dr. Gribbin received a total of $1,083 from 20 companies across 38 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Gribbin's costs compare to other hematology & oncology specialists in Grand Rapids?
Dr. Gribbin's average Medicare payment per service is $29. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Gribbin) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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