Body WaterBrain ChemistryBrain Edema
Dr. Susan Longar, MD
NPI1578506960PAC ID4486867843
- Medicare services, 2024
- 3,823
- Medicare patients, 2024
- 1,017
- Part D claims, 2024
- 2,891
- Publications
- 6
- MIPS score, 2024
- 21
- Practice address
- 1850 Sullivan Ave, Daly City, CA 94015
- Practice phone
- Call (408) 828-5973
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
North Bay Ambulatory Surgery Center
Daly City, California
Find Dr. Longar's professional email, personal email and mobile number
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Dr. Susan Longar is an ophthalmologist in Daly City, California
Dr. Longar practices at North Bay Ambulatory Surgery Center in Daly City, California.
Dr. Longar's NPI, 1578506960, was assigned on June 13, 2006. Dr. Longar graduated from UC Davis School of Medicine in 1991. Dr. Longar holds California license G751390.
NPI and contact details
- NPI
- 1578506960NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4486867843
- NPI enumeration date
- June 13, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (408) 828-5973
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Susan Longar practices at North Bay Ambulatory Surgery Center in Daly City, California
Dr. Longar's primary practice is North Bay Ambulatory Surgery Center, at 1850 Sullivan Ave, Daly City, CA 94015 in San Mateo County. The practice phone is (408) 828-5973.
- North Bay Ambulatory Surgery Center1850 Sullivan Ave, Daly City, CA 94015 · San Mateo CountyPhone(408) 828-5973
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Susan Longar is affiliated with 4 sites of care and 1 medical group
Dr. Longar's primary practice is North Bay Ambulatory Surgery Center in Daly City, California. Dr. Longar is also affiliated with AHMC Seton Medical Center. Dmand AI also links Dr. Longar to 1 more hospital, 1 group practice or clinic and 1 medical group, each named with a free account.
North Bay Ambulatory Surgery CenterPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Susan Longar's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Longar practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| North Bay Ambulatory Surgery Center | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Susan Longar is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Longar's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Longar is board certified in ophthalmology by the American Board of Ophthalmology. Dr. Longar is licensed in California.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
Clinical focus
Dmand AI lists age-related macular degeneration, cataract, cataract surgery with lens implant, cold sores or genital herpes, conjunctivitis, dry eye, eyelid inflammation and glaucoma among the conditions Dr. Longar treats.
Ophthalmologists near Dr. Longar
Counts of ophthalmologists with a Dmand AI profile, by place and practice. Each opens the list.
2,621ophthalmologists in California
7ophthalmologists in Daly City
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Susan Longar billed Medicare for 3,823 services in 2024
CMS data shows 3,823 Medicare services from Dr. Longar across 17 procedure codes in 2024, for 1,017 Medicare patients. Medicare paid $277,659 for them.
Medicare services, 20243,823
Medicare patients1,017
Paid by Medicare$277,659
Procedure codes17
Dr. Longar's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 3,0662024: 2,7869%
- Office and hospital visits
- 2023: 1072024: 543407%
- Imaging
- 2023: 3852024: 3577%
- Surgery
- 2023: 1142024: 13720%
Where Dr. Longar's Medicare services took place, 2024
- In an office3,68696%
- In a facility1374%
Dr. Longar compared with the California median for ophthalmologists, 2024
- Dr. Longar
- California median
- Medicare services
- 3,823vs 1,0793.5 times
- Medicare patients
- 1,017vs 4212.4 times
- Part D claims
- 2,744vs 6184.4 times
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. Longar'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. Longar?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Longar and other ophthalmologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Susan Longar treated 1,017 Medicare patients in 2024, average age 76
CMS counts 1,017 Medicare patients who saw Dr. Longar in 2024. The largest group is 65 to 74, with 440 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 0.97, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Longar's median patient age at 72, with 56% women.
Medicare patients, 20241,017
Average age76
Average risk score0.97
Also on Medicaid13%
Dr. Longar's Medicare patients by age, 2024
Dr. Longar's Medicare patients by sex, 2024
- Women63963%
- Men37837%
Chronic conditions among Dr. Longar's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes39%
- Arthritis36%
- Chronic kidney disease21%
- Ischemic heart disease21%
- Osteoporosis18%
- Anxiety14%
Share of Medicare patients with each condition. A patient can have several.
Dr. Longar's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women56%
- Men31%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Susan Longar wrote 2,891 Medicare Part D claims in 2024
In 2024, Dr. Longar wrote 2,891 Medicare Part D claims for 753 patients. 49% of them were for generic drugs. CMS names the drug for 2,744 of them, across 24 drugs with 11 or more claims each, at $296,400 in total drug cost. In 2023, CMS named 2,492 claims across 27 drugs.
Part D claims, 20242,891
Drugs named by CMS24
Total drug cost$296,400
Part D patients753
Dr. Longar's Part D claims by kind of drug, 2024
- Generic1,421 claims49%
- Brand-name1,470 claims51%
Dr. Longar'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. Longar's Part D claims, 2024
- Antibiotics1%40 of 2,891 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: 2,4922024: 2,74410%
Drugs named by CMS: 24 in 2024, 27 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. Susan Longar scored 21 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 21 out of 100 for Dr. Longar for performance year 2024, reported individually. Dr. Longar accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 279 procedures of cataract surgery by Dr. Longar, more than 88% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Longar's MIPS scores, performance year 2024
- 21of 100Final score
- 0of 100Quality
- 0of 100Improvement Activities
- 69of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Longar ranks in Medicare procedure volume
- Cataract surgery
- 88th percentile279 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Susan Longar has 6 publications on record
Dmand AI links 6 papers to Dr. Longar. The most frequent topics are Brain Edema, Arachidonic Acid and Arachidonic Acids.
Papers6
Topics Dr. Longar writes about most
- Brain Edema
- Arachidonic Acid
- Arachidonic Acids
- Body Water
- Brain Injuries
- Fatty Acids, Unsaturated
- Free Radicals
- Rats, Inbred Strains
Recent publications by Dr. Longar
Arachidonic AcidArachidonic AcidsAstrocytes
Body WaterFatty Acids, NonesterifiedFatty Acids, Unsaturated
Blood-Brain BarrierBrain ChemistryBrain Edema
Brain Res
5'-NucleotidaseAlkaline PhosphataseArachidonic Acid
See who Dr. Longar researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Longar works with, so you can find a warm path to the right ophthalmologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Susan Longar received $3,955 in industry payments from 2016 to 2025
CMS Open Payments shows 188 general payments to Dr. Longar from 30 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 91% of the total. Alcon Laboratories Inc paid the most, $581.
General payments to Dr. Longar by program year, 2016 to 2025
General payments to Dr. Longar by kind, 2016 to 2025
$4Kin total
- Food and beverage$3,61491%
- Education$2857%
- Entertainment$571%
Companies that paid Dr. Longar 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. Susan Longar has 1 award and honors on record
Dmand AI lists 1 award for Dr. Longar.
Awards and honors for Dr. Longar
- Undated
- AAO Fellow
Source: Dmand AI Professional Profile Data
Dr. Susan Longar graduated from UC Davis School of Medicine
Dr. Longar graduated from UC Davis School of Medicine in 1991. Dr. Longar is a member of AAO.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. Susan Longar accepts plans from 15 insurance carriers
Dr. Longar is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Humana
- Regence Health Plans
- +7 more carriersWith a free account
Plan types Dr. Longar accepts, by number of carriers
- Medicare9
- PPO9
- HMO5
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Susan Longar'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)Clinician Public Reporting: Overall MIPS Performance (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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Susan Longar
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. Susan Longar's NPI number?
Dr. Susan Longar's NPI number is 1578506960. It was assigned on June 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Susan Longar?
Dr. Susan Longar is an ophthalmologist in Daly City, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Susan Longar practice?
Dr. Longar practices at 1850 Sullivan Ave, Daly City, CA 94015. Dr. Longar's primary practice is North Bay Ambulatory Surgery Center in Daly City, California. Dmand AI also links Dr. Longar to 1 hospital, 1 group practice or clinic and 1 medical group.
What is Dr. Susan Longar's office phone number?
The practice phone on file for Dr. Longar is (408) 828-5973.
What is Dr. Susan Longar's medical license number?
Dr. Longar holds California license G751390.
Which hospitals is Dr. Susan Longar affiliated with?
Dr. Longar is affiliated with AHMC Seton Medical Center. Dmand AI links Dr. Longar to 1 more hospital.
Does Dr. Susan Longar accept Medicare?
Yes. CMS data shows Dr. Longar billed Medicare for 3,823 services in 2024, and Dr. Longar accepts Medicare assignment.
What is Dr. Susan Longar's MIPS score?
Dr. Longar's MIPS final score for performance year 2024 is 21 out of 100, reported individually.
How many Medicare patients does Dr. Susan Longar see?
CMS counts 1,017 Medicare patients who saw Dr. Longar in 2024, with an average age of 76.
Is Dr. Susan Longar board certified?
Yes. Dr. Longar is board certified in ophthalmology by the American Board of Ophthalmology.
Show 7 more questionsShow fewer questions
What services does Dr. Susan Longar bill to Medicare?
In 2024, Dr. Longar's most billed Medicare services were eye exam or test (92250), eye exam or test (92014) and eye exam or test (92134).
Where did Dr. Susan Longar go to medical school?
Dr. Longar graduated from UC Davis School of Medicine in 1991.
What drugs does Dr. Susan Longar prescribe most?
In 2024 Medicare Part D data, Dr. Longar's most prescribed drugs by claims were Latanoprost, Moxifloxacin and Prednisolone Acetate.
Has Dr. Susan Longar received payments from drug or device companies?
CMS Open Payments shows $3,955 in general payments to Dr. Longar from 30 companies from 2016 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Dr. Susan Longar been practicing?
Dr. Longar graduated from medical school in 1991, 35 years ago.
Does Dr. Susan Longar do research?
Dmand AI links 6 publications to Dr. Longar.
What insurance does Dr. Susan Longar accept?
Dr. Longar is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
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