Tammy Lynn O'Riley, FNP-C
- Medicare services, 2024
- 684
- Medicare patients, 2024
- 139
- Part D claims, 2024
- 1,489
- MIPS score, 2024
- 91
- Hospital affiliations
- 1
- Practice address
- 200 W Arbor Dr, San Diego, CA 92103
- Practice phone
- Call (619) 543-6222
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UCSD Hillcrest Medical Center
San Diego, California
Find Tammy O'Riley'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.
Tammy Lynn O'Riley is a nurse practitioner in San Diego, California
Tammy O'Riley practices at UCSD Hillcrest Medical Center in San Diego, California.
Tammy O'Riley's NPI, 1235413436, was assigned on October 6, 2011. Tammy O'Riley holds California license NP9154.
- NPI
- 1235413436NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3476798786
- NPI enumeration date
- October 6, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (619) 543-6222
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Tammy Lynn O'Riley practices at UCSD Hillcrest Medical Center in San Diego, California
Tammy O'Riley's primary practice is UCSD Hillcrest Medical Center, at 200 W Arbor Dr, San Diego, CA 92103 in San Diego County. The practice phone is (619) 543-6222.
- UCSD Hillcrest Medical Center200 W Arbor Dr, San Diego, CA 92103 · San Diego CountyPhone(619) 543-6222
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Tammy Lynn O'Riley is affiliated with 2 sites of care and 1 medical group
Tammy O'Riley's primary practice is UCSD Hillcrest Medical Center in San Diego, California. Tammy O'Riley is also affiliated with Hillcrest Medical Center. The medical group on file is UC San Diego Health.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Tammy Lynn O'Riley's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Tammy O'Riley practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCSD Hillcrest Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Tammy Lynn O'Riley is one of 5,983 nurse practitioners in California
Nurse practitioner is Tammy O'Riley's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Tammy O'Riley is board certified in family nurse practitioner by the American Academy of Nurse Practitioners Certification Program (AANPCP). Dmand AI has Tammy O'Riley's licenses on file in 2 states: California and Arizona.
Specialties and state licenses
- Nurse practitioner, CaliforniaPrimary
- Arizona license
Clinical focus
Dmand AI lists chronic diabetes, diabetic emergency, enlarged thyroid, hereditary polyneuropathy and neuropathy among the conditions Tammy O'Riley treats.
Nurse practitioners near Tammy O'Riley
Counts of nurse practitioners 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
Tammy Lynn O'Riley billed Medicare for 684 services in 2024
CMS data shows 684 Medicare services from Tammy O'Riley across 5 procedure codes in 2024, for 139 Medicare patients. Medicare paid $40,826 for them. Every service was in an office.
Tammy O'Riley's Medicare services by type, 2024
- Office and hospital visits294
- Other services246
- Tests and treatments132
- Lab and pathology12
Tammy O'Riley compared with the California median for nurse practitioners, 2024
- Tammy O'Riley
- California median
- Medicare services
- 684vs 2792.5 times
- Medicare patients
- 139vs 9251% above
- Part D claims
- 1,338vs 3663.7 times
Medians across 3,047 nurse practitioners in California with Dmand AI profiles that report each measure.
Tammy O'Riley'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Tammy Lynn O'Riley treated 139 Medicare patients in 2024, average age 69
CMS counts 139 Medicare patients who saw Tammy O'Riley in 2024. The largest group is 65 to 74, with 66 patients. 75% of them have diabetes, and 75% have high blood pressure. 29% are also on Medicaid. Their average risk score is 2.55, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Tammy O'Riley's median patient age at 51, with 48% women.
Tammy O'Riley's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Tammy O'Riley's Medicare patients by sex, 2024
- Women6849%
- Men7151%
Chronic conditions among Tammy O'Riley's Medicare patients, 2024
- Diabetes75%
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease50%
- Arthritis40%
- Ischemic heart disease36%
- Mood disorders34%
- Anxiety30%
Share of Medicare patients with each condition. A patient can have several.
Tammy O'Riley's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Tammy Lynn O'Riley wrote 1,489 Medicare Part D claims in 2024
In 2024, Tammy O'Riley wrote 1,489 Medicare Part D claims for 213 patients. 13% of them were for generic drugs. CMS names the drug for 1,338 of them, across 35 drugs with 11 or more claims each, at $835,147 in total drug cost.
Tammy O'Riley's Part D claims by kind of drug, 2024
- Generic190 claims13%
- Brand-name1,038 claims70%
- Other261 claims18%
Tammy O'Riley'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.
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
Tammy Lynn O'Riley scored 91 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Tammy O'Riley for performance year 2024, reported as part of a group. Tammy O'Riley accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Tammy O'Riley as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Tammy O'Riley's MIPS scores, performance year 2024
- 91of 100Final score
- 84.1of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 74of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Tammy Lynn O'Riley received $98 in industry payments in 2024
CMS Open Payments shows 3 general payments to Tammy O'Riley from 2 drug and device companies in 2024. Food and beverage make up the largest share, 69% of the total. Insulet Corporation paid the most, $68.
General payments to Tammy O'Riley by kind, 2024 to 2024
- Food and beverage$6869%
- Device or supply loans$3031%
Companies that paid Tammy O'Riley the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Tammy Lynn O'Riley is board certified in family nurse practitioner
Tammy O'Riley is a member of AANP.
- Board certified in family nurse practitioner
Source: Dmand AI Professional Profile Data
Sources for Tammy Lynn O'Riley'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 DataDmand AI Org Hierarchy 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)Clinician Public Reporting: Overall MIPS Performance (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 Tammy Lynn O'Riley
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Tammy Lynn O'Riley's NPI number?
Tammy Lynn O'Riley's NPI number is 1235413436. It was assigned on October 6, 2011, and it is active in the NPI Registry.
What does Tammy Lynn O'Riley specialize in?
Tammy Lynn O'Riley is a nurse practitioner in San Diego, California. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Tammy Lynn O'Riley practice?
Tammy O'Riley practices at 200 W Arbor Dr, San Diego, CA 92103. Tammy O'Riley's primary practice is UCSD Hillcrest Medical Center in San Diego, California.
What is Tammy Lynn O'Riley's office phone number?
The practice phone on file for Tammy O'Riley is (619) 543-6222.
What is Tammy Lynn O'Riley's medical license number?
Tammy O'Riley holds California license NP9154, one of the licenses on file in 2 states.
Which states has Tammy Lynn O'Riley been licensed in?
Dmand AI has state licenses on file for Tammy O'Riley in California and Arizona.
Which hospitals is Tammy Lynn O'Riley affiliated with?
Tammy O'Riley is affiliated with Hillcrest Medical Center.
What medical group is Tammy Lynn O'Riley part of?
Tammy O'Riley is linked to UC San Diego Health.
Does Tammy Lynn O'Riley accept Medicare?
Yes. CMS data shows Tammy O'Riley billed Medicare for 684 services in 2024, and Tammy O'Riley accepts Medicare assignment.
Does Tammy Lynn O'Riley offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Tammy O'Riley as offering telehealth services.
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What is Tammy Lynn O'Riley's MIPS score?
Tammy O'Riley's MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
How many Medicare patients does Tammy Lynn O'Riley see?
CMS counts 139 Medicare patients who saw Tammy O'Riley in 2024, with an average age of 69.
Is Tammy Lynn O'Riley board certified?
Yes. Tammy O'Riley is board certified in family nurse practitioner by the American Academy of Nurse Practitioners Certification Program (AANPCP).
What services does Tammy Lynn O'Riley bill to Medicare?
In 2024, Tammy O'Riley's most billed Medicare services were office visit, established patient (99215), medicare service (G2211) and medical service (95251).
What drugs does Tammy Lynn O'Riley prescribe most?
In 2024 Medicare Part D data, Tammy O'Riley's most prescribed drugs by claims were Mounjaro, Nano 2nd Gen Pen Needle and Ozempic.
Has Tammy Lynn O'Riley received payments from drug or device companies?
CMS Open Payments shows $98 in general payments to Tammy O'Riley from 2 companies from 2024 to 2024. The largest total came from Insulet Corporation.
How long has Tammy Lynn O'Riley been practicing?
Tammy O'Riley graduated from medical school in 1997, 29 years ago.
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