Dr. Stephen C. Hammack, MD
- Medicare services, 2024
- 1,538
- Medicare patients, 2024
- 159
- Part D claims, 2024
- 4,809
- Hospital affiliations
- 2
- Industry payments
- $11,386
- Practice address
- 415 S 28th Ave, Hattiesburg, MS 39401
- Practice phone
- Call (601) 579-5488
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Hattiesburg Clinic PA
Hattiesburg, Mississippi
Find Dr. Hammack'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. Stephen C. Hammack is a family medicine physician in Hattiesburg, Mississippi
Dr. Hammack practices at Hattiesburg Clinic PA in Hattiesburg, Mississippi.
Dr. Hammack's NPI, 1639396393, was assigned on April 20, 2007. Dr. Hammack graduated from University of Mississippi School of Medicine in 2004. Dr. Hammack holds Mississippi license 19226.
- NPI
- 1639396393NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5698868560
- NPI enumeration date
- April 20, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (601) 579-5488
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen C. Hammack practices at Hattiesburg Clinic PA in Hattiesburg, Mississippi
Dr. Hammack's primary practice is Hattiesburg Clinic PA, at 415 S 28th Ave, Hattiesburg, MS 39401 in Forrest County. The practice phone is (601) 579-5488.
- Hattiesburg Clinic PA415 S 28th Ave, Hattiesburg, MS 39401 · Forrest CountyPhone(601) 579-5488
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Stephen C. Hammack is affiliated with 6 sites of care and 2 medical groups
Dr. Hammack's primary practice is Hattiesburg Clinic PA in Hattiesburg, Mississippi. Dr. Hammack is also affiliated with Mississippi Baptist Medical Center. The medical group on file is Hattiesburg Clinic. Dmand AI also links Dr. Hammack to 1 more hospital, 2 group practices and clinics, 1 home health agency 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. Stephen C. Hammack's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hammack practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hattiesburg Clinic PA | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen C. Hammack is one of 954 family medicine physicians in Mississippi
Family medicine is Dr. Hammack's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Hammack is licensed in Mississippi.
Specialties and state licenses
- Family medicine, MississippiPrimary
Family medicine physicians near Dr. Hammack
Counts of family medicine physicians 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. Stephen C. Hammack billed Medicare for 1,538 services in 2024
CMS data shows 1,538 Medicare services from Dr. Hammack across 19 procedure codes in 2024, for 159 Medicare patients. Medicare paid $51,053 for them. Every service was in an office.
Dr. Hammack's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5832024: 41229%
- Lab and pathology
- 2023: 2982024: 37526%
- Other services
- 2023: 1192024: 305156%
- Drugs given in the office
- 2023: 4562024: 17761%
- Surgery
- 2023: 2002024: 15423%
- Tests and treatments
- 2023: 1682024: 11532%
Dr. Hammack compared with the Mississippi median for family medicine physicians, 2024
- Dr. Hammack
- Mississippi median
- Medicare services
- 1,538vs 80092% above
- Medicare patients
- 159vs 25538% below
- Part D claims
- 4,241vs 1,7922.4 times
Medians across 967 family medicine physicians in Mississippi with Dmand AI profiles that report each measure.
Dr. Hammack'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. Hammack?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hammack and other family medicine physicians in Mississippi.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen C. Hammack treated 159 Medicare patients in 2024, average age 73
CMS counts 159 Medicare patients who saw Dr. Hammack in 2024. The largest group is 65 to 74, with 81 patients. 75% of them have high blood pressure, and 74% have high cholesterol. 8% are also on Medicaid. Their average risk score is 1.23, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hammack's median patient age at 59, with 56% women.
Dr. Hammack's Medicare patients by age, 2024
Dr. Hammack's Medicare patients by sex, 2024
- Women8956%
- Men7044%
Chronic conditions among Dr. Hammack's Medicare patients, 2024
- High blood pressure75%
- High cholesterol74%
- Arthritis53%
- Diabetes34%
- Anxiety32%
- Ischemic heart disease31%
- Mood disorders26%
- Chronic kidney disease25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hammack'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
- Women56%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen C. Hammack wrote 4,809 Medicare Part D claims in 2024
In 2024, Dr. Hammack wrote 4,809 Medicare Part D claims for 276 patients. 84% of them were for generic drugs. CMS names the drug for 4,241 of them, across 114 drugs with 11 or more claims each, at $416,236 in total drug cost. In 2023, CMS named 4,961 claims across 125 drugs.
Dr. Hammack's Part D claims by kind of drug, 2024
- Generic4,022 claims84%
- Brand-name753 claims16%
- Other34 claims1%
Dr. Hammack'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. Hammack's Part D claims, 2024
- Opioids4%208 of 4,809 claims
- Antibiotics4%184 of 4,809 claims
- Antipsychotics, patients 65 and over0%15 of 4,809 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: 4,9612024: 4,24115%
Drugs named by CMS: 114 in 2024, 125 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
Dr. Stephen C. Hammack offers telehealth to Medicare patients
Dr. Hammack accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Hammack as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Stephen C. Hammack received $11,386 in industry payments from 2016 to 2025
CMS Open Payments shows 921 general payments to Dr. Hammack from 41 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $1,777.
General payments to Dr. Hammack by program year, 2016 to 2025
General payments to Dr. Hammack by kind, 2016 to 2025
- Food and beverage$11,331100%
- Education$550%
Companies that paid Dr. Hammack 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. Stephen C. Hammack graduated from University of Mississippi School of Medicine
Dr. Hammack graduated from University of Mississippi School of Medicine in 2004.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Stephen C. Hammack'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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Stephen C. Hammack
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. Stephen C. Hammack's NPI number?
Dr. Stephen C. Hammack's NPI number is 1639396393. It was assigned on April 20, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen C. Hammack?
Dr. Stephen C. Hammack is a family medicine physician in Hattiesburg, Mississippi. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Stephen C. Hammack practice?
Dr. Hammack practices at 415 S 28th Ave, Hattiesburg, MS 39401. Dr. Hammack's primary practice is Hattiesburg Clinic PA in Hattiesburg, Mississippi. Dmand AI also links Dr. Hammack to 1 hospital, 2 group practices and clinics, 1 home health agency and 1 medical group.
What is Dr. Stephen C. Hammack's office phone number?
The practice phone on file for Dr. Hammack is (601) 579-5488.
What is Dr. Stephen C. Hammack's medical license number?
Dr. Hammack holds Mississippi license 19226.
Which hospitals is Dr. Stephen C. Hammack affiliated with?
Dr. Hammack is affiliated with Mississippi Baptist Medical Center. Dmand AI links Dr. Hammack to 1 more hospital.
What medical group is Dr. Stephen C. Hammack part of?
Dr. Hammack is linked to Hattiesburg Clinic. Dmand AI links Dr. Hammack to 1 more medical group.
Does Dr. Stephen C. Hammack accept Medicare?
Yes. CMS data shows Dr. Hammack billed Medicare for 1,538 services in 2024, and Dr. Hammack accepts Medicare assignment.
Does Dr. Stephen C. Hammack offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Hammack as offering telehealth services.
How many Medicare patients does Dr. Stephen C. Hammack see?
CMS counts 159 Medicare patients who saw Dr. Hammack in 2024, with an average age of 73.
Show 5 more questionsShow fewer questions
What services does Dr. Stephen C. Hammack bill to Medicare?
In 2024, Dr. Hammack's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and injected or infused drug (J1100).
Where did Dr. Stephen C. Hammack go to medical school?
Dr. Hammack graduated from University of Mississippi School of Medicine in 2004.
What drugs does Dr. Stephen C. Hammack prescribe most?
In 2024 Medicare Part D data, Dr. Hammack's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Pantoprazole Sodium.
Has Dr. Stephen C. Hammack received payments from drug or device companies?
CMS Open Payments shows $11,386 in general payments to Dr. Hammack from 41 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Stephen C. Hammack been practicing?
Dr. Hammack graduated from medical school in 2004, 22 years ago.
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