Dr. Grant C. Zimmerman, MD
- Part D claims, 2024
- 117
- Hospital affiliations
- 1
- Industry payments
- $8,359
- State license
- 1
- Year NPI issued
- 2021
- Practice address
- 101 E Wood St, Spartanburg, SC 29303
- Practice phone
- Call (864) 560-6554
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Zimmerman'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. Grant C. Zimmerman is a general surgeon in Spartanburg, South Carolina
Dr. Zimmerman practices at Spartanburg Medical Center in Spartanburg, South Carolina, part of Spartanburg Regional Healthcare System.
Dr. Zimmerman's NPI, 1285209957, was assigned on May 25, 2021. Dr. Zimmerman holds South Carolina license LL86074.
- NPI
- 1285209957NPI Registry (opens in a new tab)
- NPI enumeration date
- May 25, 2021
- NPI status
- Active
- Practice phone
- (864) 560-6554
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Grant C. Zimmerman practices at Spartanburg Medical Center in Spartanburg, South Carolina
Dr. Zimmerman's primary practice is Spartanburg Medical Center, at 101 E Wood St, Spartanburg, SC 29303 in Spartanburg County. The practice phone is (864) 560-6554.
- Spartanburg Medical Center101 E Wood St, Spartanburg, SC 29303 · Spartanburg CountyPhone(864) 560-6554
Source: Dmand AI Affiliation Data
Dr. Grant C. Zimmerman is affiliated with 1 site of care
Dr. Zimmerman's primary practice is Spartanburg Medical Center in Spartanburg, South Carolina, part of Spartanburg Regional Healthcare System.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Grant C. Zimmerman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zimmerman practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Spartanburg Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Spartanburg Regional Healthcare System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Grant C. Zimmerman is one of 506 general surgeons in South Carolina
Surgery is Dr. Zimmerman's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Zimmerman is licensed in South Carolina.
Specialties and state licenses
- Surgery, South CarolinaPrimary
General surgeons near Dr. Zimmerman
Counts of general surgeons 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. Grant C. Zimmerman's patients have a median age of 59
Across all payers, Dmand AI patient panel data puts Dr. Zimmerman's median patient age at 59, with 50% women.
Dr. Zimmerman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Grant C. Zimmerman wrote 117 Medicare Part D claims in 2024
In 2024, Dr. Zimmerman wrote 117 Medicare Part D claims for 43 patients. 97% of them were for generic drugs. CMS names the drug for 18 of them, across 1 drug with 11 or more claims each, at $72 in total drug cost. In 2023, CMS named 104 claims across 6 drugs.
Dr. Zimmerman's Part D claims by kind of drug, 2024
- Generic114 claims97%
- Brand-name and other3 claims3%
Dr. Zimmerman'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. Zimmerman's Part D claims, 2024
- Opioids26%30 of 117 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: 1042024: 1883%
Drugs named by CMS: 1 in 2024, 6 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
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Dr. Grant C. Zimmerman received $8,359 in industry payments from 2022 to 2025
CMS Open Payments shows 32 general payments to Dr. Zimmerman from 13 drug and device companies from 2022 to 2025. Education make up the largest share, 48% of the total. Intuitive Surgical, Inc. paid the most, $5,653.
General payments to Dr. Zimmerman by program year, 2022 to 2025
General payments to Dr. Zimmerman by kind, 2022 to 2025
- Education$4,00048%
- Travel and lodging$2,95735%
- Food and beverage$1,40217%
Companies that paid Dr. Zimmerman the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Grant C. Zimmerman'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Grant C. Zimmerman
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. Grant C. Zimmerman's NPI number?
Dr. Grant C. Zimmerman's NPI number is 1285209957. It was assigned on May 25, 2021, and it is active in the NPI Registry.
What kind of doctor is Dr. Grant C. Zimmerman?
Dr. Grant C. Zimmerman is a general surgeon in Spartanburg, South Carolina. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Grant C. Zimmerman practice?
Dr. Zimmerman practices at 101 E Wood St, Spartanburg, SC 29303. Dr. Zimmerman's primary practice is Spartanburg Medical Center in Spartanburg, South Carolina, part of Spartanburg Regional Healthcare System.
What is Dr. Grant C. Zimmerman's office phone number?
The practice phone on file for Dr. Zimmerman is (864) 560-6554.
What is Dr. Grant C. Zimmerman's medical license number?
Dr. Zimmerman holds South Carolina license LL86074.
Which hospitals is Dr. Grant C. Zimmerman affiliated with?
Dr. Zimmerman practices at Spartanburg Medical Center in Spartanburg, South Carolina.
What drugs does Dr. Grant C. Zimmerman prescribe most?
In 2024 Medicare Part D data, Dr. Zimmerman's most prescribed drugs by claims were Hydrocodone-Acetaminophen.
Has Dr. Grant C. Zimmerman received payments from drug or device companies?
CMS Open Payments shows $8,359 in general payments to Dr. Zimmerman from 13 companies from 2022 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Grant C. Zimmerman been practicing?
Dr. Zimmerman's NPI was assigned in 2021.
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