Dr. Nathan C. Hammel, MD
- Medicare services, 2024
- 2,051
- Medicare patients, 2024
- 188
- Part D claims, 2024
- 63
- Publications
- 2
- Industry payments
- $2,185
- Practice address
- 332 Santa Fe Drive, Encinitas, CA 92024
- Practice phone
- Call (760) 943-6700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
San Dieguito Orthopedic Medical Center PC
Surgical practice · Encinitas, California
Find Dr. Hammel'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. Nathan C. Hammel is an orthopedic surgeon in Encinitas, California
Dr. Hammel practices at San Dieguito Orthopedic Medical Center PC in Encinitas, California.
Dr. Hammel's NPI, 1558435644, was assigned on November 20, 2006. Dr. Hammel graduated from Sidney Kimmel Medical College in 2006. Dr. Hammel's California license number on file is A139718.
- NPI
- 1558435644NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8527284306
- NPI enumeration date
- November 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (760) 943-6700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nathan C. Hammel practices at San Dieguito Orthopedic Medical Center PC in Encinitas, California
Dr. Hammel's primary practice is San Dieguito Orthopedic Medical Center PC, at 332 Santa Fe Drive, Encinitas, CA 92024. The practice phone is (760) 943-6700.
- San Dieguito Orthopedic Medical Center PC332 Santa Fe Drive, Encinitas, CA 92024Phone(760) 943-6700
Source: Dmand AI Affiliation Data
Dr. Nathan C. Hammel is affiliated with 2 sites of care and 2 medical groups
Dr. Hammel's primary practice is San Dieguito Orthopedic Medical Center PC in Encinitas, California. The medical group on file is CORE Orthopaedic Medical Center. Dmand AI also links Dr. Hammel to 1 more group practice or clinic and 1 medical group, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Nathan C. Hammel's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hammel practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| San Dieguito Orthopedic Medical Center PC | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Nathan C. Hammel is one of 2,056 orthopedic surgeons in California
Orthopaedic surgery is Dr. Hammel's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Hammel is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery. Dmand AI has Dr. Hammel's licenses on file in 8 states: California, Florida, Colorado, Utah, Oregon, Montana, Indiana and Idaho.
Specialties and state licenses
- Orthopaedic surgery, CaliforniaPrimary
- Florida license
- Colorado license
- Utah license
- Oregon license
- Montana license
- Indiana license
- Idaho license
Clinical focus
Dmand AI lists arthritis, bursitis, fluid in a joint, hip replacement, joint pain, knee arthroscopy, knee fracture and dislocation and knee injury among the conditions Dr. Hammel treats.
Orthopedic surgeons near Dr. Hammel
Counts of orthopedic 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. Nathan C. Hammel billed Medicare for 2,051 services in 2024
CMS data shows 2,051 Medicare services from Dr. Hammel across 13 procedure codes in 2024, for 188 Medicare patients. Medicare paid $60,799 for them.
Dr. Hammel's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 3842024: 1,578311%
- Office and hospital visits
- 2023: 2552024: 2706%
- Imaging
- 2023: 652024: 10562%
- Surgery
- 2023: 1312024: 9825%
Where Dr. Hammel's Medicare services took place, 2024
- In an office2,01998%
- In a facility322%
Dr. Hammel compared with the California median for orthopedic surgeons, 2024
- Dr. Hammel
- California median
- Medicare services
- 2,051vs 6833.0 times
- Medicare patients
- 188vs 21513% below
- Part D claims
- 14vs 7080% below
Medians across 1,844 orthopedic surgeons in California with Dmand AI profiles that report each measure.
Dr. Hammel'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. Hammel?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hammel and other orthopedic surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nathan C. Hammel treated 188 Medicare patients in 2024, average age 74
CMS counts 188 Medicare patients who saw Dr. Hammel in 2024. The largest group is 65 to 74, with 104 patients. 75% of them have arthritis, and 75% have high cholesterol. 7% are also on Medicaid. Their average risk score is 0.99, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hammel's median patient age at 64, with 59% women.
Dr. Hammel's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hammel's Medicare patients by sex, 2024
- Women10455%
- Men8445%
Chronic conditions among Dr. Hammel's Medicare patients, 2024
- Arthritis75%
- High cholesterol75%
- High blood pressure59%
- Anxiety26%
- Mood disorders26%
- Depression24%
- Ischemic heart disease22%
- Diabetes21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hammel's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women59%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Nathan C. Hammel wrote 63 Medicare Part D claims in 2024
In 2024, Dr. Hammel wrote 63 Medicare Part D claims for 39 patients. 100% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $702 in total drug cost. In 2023, CMS named 38 claims across 2 drugs.
Dr. Hammel'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. Hammel's Part D claims, 2024
- Opioids30%19 of 63 claims
- Antibiotics21%13 of 63 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: 382024: 1463%
Drugs named by CMS: 1 in 2024, 2 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. Nathan C. Hammel takes part in Medicare
Dr. Hammel accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Hip replacement: 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. Nathan C. Hammel has 2 publications on record
Dmand AI links 2 papers to Dr. Hammel, published from 2012 to 2014. Dr. Hammel's most frequent co-authors are Jose Francisco Inzunza, MD, Leo T. Kroonen, MD and Lucas Stevenson McDonald, MD.
Dr. Hammel's most frequent co-authors
- Jose Francisco Inzunza, MD1 shared paper
- Leo T. Kroonen, MD1 shared paper
- Lucas Stevenson McDonald, MD1 shared paper
Recent publications by Dr. Hammel
J Hand Surg Am
See who Dr. Hammel researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hammel works with, so you can find a warm path to the right orthopedic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Nathan C. Hammel received $2,185 in industry payments from 2016 to 2025
CMS Open Payments shows 73 general payments to Dr. Hammel from 17 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $872.
General payments to Dr. Hammel by program year, 2016 to 2025
Companies that paid Dr. Hammel 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. Nathan C. Hammel graduated from Sidney Kimmel Medical College
Dr. Hammel graduated from Sidney Kimmel Medical College in 2006.
- Medical school
- Board certified in orthopaedic surgery
Source: Dmand AI Professional Profile Data
Dr. Nathan C. Hammel accepts plans from 16 insurance carriers
Dr. Hammel is in network with 16 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Humana
- Blue Cross Blue Shield of Massachusetts
- Molina
- +8 more carriersWith a free account
Plan types Dr. Hammel accepts, by number of carriers
- PPO10
- Medicare9
- HMO8
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Nathan C. Hammel'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 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Nathan C. Hammel
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. Nathan C. Hammel's NPI number?
Dr. Nathan C. Hammel's NPI number is 1558435644. It was assigned on November 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Nathan C. Hammel?
Dr. Nathan C. Hammel is an orthopedic surgeon in Encinitas, California. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Nathan C. Hammel practice?
Dr. Hammel practices at 332 Santa Fe Drive, Encinitas, CA 92024. Dr. Hammel's primary practice is San Dieguito Orthopedic Medical Center PC in Encinitas, California. Dmand AI also links Dr. Hammel to 1 group practice or clinic and 1 medical group.
What is Dr. Nathan C. Hammel's office phone number?
The practice phone on file for Dr. Hammel is (760) 943-6700.
What is Dr. Nathan C. Hammel's medical license number?
Dr. Hammel's California license number on file is A139718, one of the licenses on file in 8 states.
Which states has Dr. Nathan C. Hammel been licensed in?
Dmand AI has state licenses on file for Dr. Hammel in California (2015 to 2025), Florida (since 2013), Colorado (2024 to 2027), Utah (2024 to 2026), Oregon (2012 to 2025), Montana (2016 to 2024), Indiana (2008 to 2017) and Idaho (2014 to 2016).
What medical group is Dr. Nathan C. Hammel part of?
Dr. Hammel is linked to CORE Orthopaedic Medical Center. Dmand AI links Dr. Hammel to 1 more medical group.
Does Dr. Nathan C. Hammel accept Medicare?
Yes. CMS data shows Dr. Hammel billed Medicare for 2,051 services in 2024, and Dr. Hammel accepts Medicare assignment.
How many Medicare patients does Dr. Nathan C. Hammel see?
CMS counts 188 Medicare patients who saw Dr. Hammel in 2024, with an average age of 74.
Is Dr. Nathan C. Hammel board certified?
Yes. Dr. Hammel is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery.
Show 8 more questionsShow fewer questions
What services does Dr. Nathan C. Hammel bill to Medicare?
In 2024, Dr. Hammel's most billed Medicare services were injected or infused drug (J7318), injected or infused drug (J3301) and office visit, established patient (99213).
Where did Dr. Nathan C. Hammel go to medical school?
Dr. Hammel graduated from Sidney Kimmel Medical College in 2006.
What drugs does Dr. Nathan C. Hammel prescribe most?
In 2024 Medicare Part D data, Dr. Hammel's most prescribed drugs by claims were Celecoxib.
Has Dr. Nathan C. Hammel received payments from drug or device companies?
CMS Open Payments shows $2,185 in general payments to Dr. Hammel from 17 companies from 2016 to 2025. The largest total came from Stryker Corporation.
How long has Dr. Nathan C. Hammel been practicing?
Dr. Hammel graduated from medical school in 2006, 20 years ago.
Does Dr. Nathan C. Hammel do research?
Dmand AI links 2 publications to Dr. Hammel, published from 2012 to 2014.
Who does Dr. Nathan C. Hammel publish with?
Dr. Hammel's most frequent co-authors are Jose Francisco Inzunza, MD (1 shared paper), Leo T. Kroonen, MD (1 shared paper) and Lucas Stevenson McDonald, MD (1 shared paper).
What insurance does Dr. Nathan C. Hammel accept?
Dr. Hammel is in network with 16 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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