Nathan S. Orr, OD
- Medicare patients, 2024
- 220
- Part D claims, 2024
- 61
- Industry payments
- $78
- Affiliated sites
- 3
- Medical group
- 1
- Practice address
- 365 Lennon Lane, Suite 100, Walnut Creek, CA 94598
- Practice phone
- Call (925) 939-4600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Walnut Creek Endoscopy Center
Surgery Center - Medicare-Certified · Walnut Creek, California
Find Nathan Orr'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.
Nathan S. Orr is an optometrist in Walnut Creek, California
Nathan Orr practices at Walnut Creek Endoscopy Center in Walnut Creek, California.
Nathan Orr's NPI, 1558561183, was assigned on July 22, 2007. Nathan Orr graduated from University of California - School of Optometry in 2007. Nathan Orr holds California license 13334T.
- NPI
- 1558561183NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1951472828
- NPI enumeration date
- July 22, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (925) 939-4600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Nathan S. Orr practices at Walnut Creek Endoscopy Center in Walnut Creek, California
Nathan Orr's primary practice is Walnut Creek Endoscopy Center, at 365 Lennon Lane, Suite 100, Walnut Creek, CA 94598. The practice phone is (925) 939-4600.
- Walnut Creek Endoscopy Center365 Lennon Lane, Suite 100, Walnut Creek, CA 94598Phone(925) 939-4600
Source: Dmand AI Affiliation Data
Nathan S. Orr is affiliated with 3 sites of care and 1 medical group
Nathan Orr's primary practice is Walnut Creek Endoscopy Center in Walnut Creek, California. Dmand AI also links Nathan Orr to 1 dialysis center, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Nathan S. Orr's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Nathan Orr practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Walnut Creek Endoscopy Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Nathan S. Orr is one of 7,206 optometrists in California
Optometrist is Nathan Orr's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Nathan Orr is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Nathan Orr
Counts of optometrists 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
Nathan S. Orr treated 220 Medicare patients in 2024, average age 75
CMS counts 220 Medicare patients who saw Nathan Orr in 2024. The largest group is 65 to 74, with 103 patients. 75% of them have high cholesterol, and 54% have high blood pressure. Their average risk score is 0.85, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Nathan Orr's median patient age at 68, with 65% women.
Nathan Orr's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Nathan Orr's Medicare patients by sex, 2024
- Women13260%
- Men8840%
Chronic conditions among Nathan Orr's Medicare patients, 2024
- High cholesterol75%
- High blood pressure54%
- Arthritis37%
- Osteoporosis25%
- Cancer23%
- Ischemic heart disease19%
- Atrial fibrillation18%
- Mood disorders18%
Share of Medicare patients with each condition. A patient can have several.
Nathan Orr's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women65%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Nathan S. Orr wrote 61 Medicare Part D claims in 2024
In 2024, Nathan Orr wrote 61 Medicare Part D claims for 23 patients. 44% of them were for generic drugs.
Nathan Orr's Part D claims by kind of drug, 2024
- Generic27 claims44%
- Brand-name34 claims56%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Nathan S. Orr takes part in Medicare
Nathan Orr 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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Nathan S. Orr received $78 in industry payments in 2025
CMS Open Payments shows 3 general payments to Nathan Orr from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. CooperVision Inc. paid the most, $63.
Companies that paid Nathan Orr the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Nathan S. Orr graduated from University of California - School of Optometry
Nathan Orr graduated from University of California - School of Optometry in 2007.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Nathan S. Orr'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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | 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) |
| 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 Nathan S. Orr
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Nathan S. Orr's NPI number?
Nathan S. Orr's NPI number is 1558561183. It was assigned on July 22, 2007, and it is active in the NPI Registry.
What does Nathan S. Orr specialize in?
Nathan S. Orr is an optometrist in Walnut Creek, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Nathan S. Orr practice?
Nathan Orr practices at 365 Lennon Lane, Suite 100, Walnut Creek, CA 94598. Nathan Orr's primary practice is Walnut Creek Endoscopy Center in Walnut Creek, California. Dmand AI also links Nathan Orr to 1 dialysis center, 1 group practice or clinic and 1 medical group.
What is Nathan S. Orr's office phone number?
The practice phone on file for Nathan Orr is (925) 939-4600.
What is Nathan S. Orr's medical license number?
Nathan Orr holds California license 13334T.
Does Nathan S. Orr accept Medicare?
Yes. CMS lists Nathan Orr as accepting Medicare assignment.
How many Medicare patients does Nathan S. Orr see?
CMS counts 220 Medicare patients who saw Nathan Orr in 2024, with an average age of 75.
Where did Nathan S. Orr go to medical school?
Nathan Orr graduated from University of California - School of Optometry in 2007.
Has Nathan S. Orr received payments from drug or device companies?
CMS Open Payments shows $78 in general payments to Nathan Orr from 2 companies from 2025 to 2025. The largest total came from CooperVision Inc.
How long has Nathan S. Orr been practicing?
Nathan Orr graduated from medical school in 2007, 19 years ago.
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