Nathan I. Lim
- Medicare services, 2024
- 267
- Medicare patients, 2024
- 100
- Part D claims, 2024
- 1,911
- MIPS score, 2024
- 79
- Hospital affiliations
- 2
- Practice address
- 12522 E Lambert Rd, Whittier, CA 90606
- Practice phone
- Call (562) 789-5420
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
PIH Health Physicians
Whittier, California
Find Nathan Lim'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 I. Lim is an internist in Whittier, California
Nathan Lim practices at PIH Health Physicians in Whittier, California.
Nathan Lim's NPI, 1396286720, was assigned on March 18, 2017. Nathan Lim graduated from Boston University School of Medicine in 2017. Nathan Lim holds California license A157848.
- NPI
- 1396286720NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5890162739
- NPI enumeration date
- March 18, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (562) 789-5420
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Nathan I. Lim practices at PIH Health Physicians in Whittier, California
Nathan Lim's primary practice is PIH Health Physicians, at 12522 E Lambert Rd, Whittier, CA 90606 in Los Angeles County. The practice phone is (562) 789-5420.
- PIH Health Physicians12522 E Lambert Rd, Whittier, CA 90606 · Los Angeles CountyPhone(562) 789-5420
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Nathan I. Lim is affiliated with 4 sites of care and 1 medical group
Nathan Lim's primary practice is PIH Health Physicians in Whittier, California. Nathan Lim is also affiliated with PIH Health Whittier Hospital. The medical group on file is PIH Health Physicians. Dmand AI also links Nathan Lim to 1 more hospital and 1 group practice or clinic, each named with a free account.
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 Nathan I. Lim's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Nathan Lim practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| PIH Health Physicians | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Nathan I. Lim is one of 16,751 internists in California
Internal medicine is Nathan Lim's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Nathan Lim is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Nathan Lim
Counts of internists 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 I. Lim billed Medicare for 267 services in 2024
CMS data shows 267 Medicare services from Nathan Lim across 4 procedure codes in 2024, for 100 Medicare patients. Medicare paid $21,581 for them. Every service was in an office.
Nathan Lim's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1812024: 21921%
- Surgery
- 2023: 372024: 4830%
Nathan Lim compared with the California median for internists, 2024
- Nathan Lim
- California median
- Medicare services
- 267vs 36126% below
- Medicare patients
- 100vs 15134% below
- Part D claims
- 1,751vs 4214.2 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Nathan Lim'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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Medicare shows one payer. Book a meeting to get commercial claims data for Nathan Lim and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Nathan I. Lim treated 100 Medicare patients in 2024, average age 70
CMS counts 100 Medicare patients who saw Nathan Lim in 2024. The largest group is 65 to 74, with 52 patients. 75% of them have arthritis, and 75% have high blood pressure. 52% are also on Medicaid. Their average risk score is 1.17, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Nathan Lim's median patient age at 62, with 82% women.
Nathan Lim's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Nathan Lim's Medicare patients by sex, 2024
- Women8383%
- Men1717%
Chronic conditions among Nathan Lim's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Diabetes39%
- Osteoporosis34%
- Chronic kidney disease29%
- Depression21%
- Mood disorders21%
Share of Medicare patients with each condition. A patient can have several.
Nathan Lim's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women82%
- Men17%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Nathan I. Lim wrote 1,911 Medicare Part D claims in 2024
In 2024, Nathan Lim wrote 1,911 Medicare Part D claims for 345 patients. 85% of them were for generic drugs. CMS names the drug for 1,751 of them, across 32 drugs with 11 or more claims each, at $1,034,390 in total drug cost. In 2023, CMS named 1,145 claims across 24 drugs.
Nathan Lim's Part D claims by kind of drug, 2024
- Generic1,622 claims85%
- Brand-name289 claims15%
Nathan Lim'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 Nathan Lim's Part D claims, 2024
- Opioids2%29 of 1,911 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: 1,1452024: 1,75153%
Drugs named by CMS: 32 in 2024, 24 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
Nathan I. Lim scored 79 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 79 out of 100 for Nathan Lim for performance year 2024, reported as part of a group. Nathan Lim accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Nathan Lim's MIPS scores, performance year 2024
- 79of 100Final score
- 58.7of 100Quality
- 40of 100Improvement Activities
- 75of 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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Nathan I. Lim received $297 in industry payments from 2022 to 2025
CMS Open Payments shows 7 general payments to Nathan Lim from 5 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 100% of the total. Edwards Lifesciences Corporation paid the most, $139.
General payments to Nathan Lim by program year, 2022 to 2025
Companies that paid Nathan Lim the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Nathan I. Lim graduated from Boston University School of Medicine
Nathan Lim graduated from Boston University School of Medicine in 2017.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Nathan I. Lim'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 Nathan I. Lim
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 I. Lim's NPI number?
Nathan I. Lim's NPI number is 1396286720. It was assigned on March 18, 2017, and it is active in the NPI Registry.
What does Nathan I. Lim specialize in?
Nathan I. Lim is an internist in Whittier, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Nathan I. Lim practice?
Nathan Lim practices at 12522 E Lambert Rd, Whittier, CA 90606. Nathan Lim's primary practice is PIH Health Physicians in Whittier, California. Dmand AI also links Nathan Lim to 1 hospital and 1 group practice or clinic.
What is Nathan I. Lim's office phone number?
The practice phone on file for Nathan Lim is (562) 789-5420.
What is Nathan I. Lim's medical license number?
Nathan Lim holds California license A157848.
Which hospitals is Nathan I. Lim affiliated with?
Nathan Lim is affiliated with PIH Health Whittier Hospital. Dmand AI links Nathan Lim to 1 more hospital.
What medical group is Nathan I. Lim part of?
Nathan Lim is linked to PIH Health Physicians.
Does Nathan I. Lim accept Medicare?
Yes. CMS data shows Nathan Lim billed Medicare for 267 services in 2024, and Nathan Lim accepts Medicare assignment.
What is Nathan I. Lim's MIPS score?
Nathan Lim's MIPS final score for performance year 2024 is 79 out of 100, reported as part of a group.
How many Medicare patients does Nathan I. Lim see?
CMS counts 100 Medicare patients who saw Nathan Lim in 2024, with an average age of 70.
Show 5 more questionsShow fewer questions
What services does Nathan I. Lim bill to Medicare?
In 2024, Nathan Lim's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and office visit, established patient (99213).
Where did Nathan I. Lim go to medical school?
Nathan Lim graduated from Boston University School of Medicine in 2017.
What drugs does Nathan I. Lim prescribe most?
In 2024 Medicare Part D data, Nathan Lim's most prescribed drugs by claims were Methotrexate, Hydroxychloroquine Sulfate and Prednisone.
Has Nathan I. Lim received payments from drug or device companies?
CMS Open Payments shows $297 in general payments to Nathan Lim from 5 companies from 2022 to 2025. The largest total came from Edwards Lifesciences Corporation.
How long has Nathan I. Lim been practicing?
Nathan Lim graduated from medical school in 2017, 9 years ago.
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