Dr. Nayyar Siddique, MD
- Medicare services, 2024
- 1,856
- Medicare patients, 2024
- 194
- Part D claims, 2024
- 620
- Hospital affiliations
- 5
- Industry payments
- $28,599
- Practice address
- 1531 Esplanade, Chico, CA 95926
- Practice phone
- Call (530) 332-7300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Siddique'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. Nayyar Siddique is a hematologist and oncologist in Chico, California
Dr. Siddique practices at Enloe Health in Chico, California, part of Enloe Health.
Dr. Siddique's NPI, 1497890610, was assigned on February 21, 2007. Dr. Siddique graduated from Dow University of Health Sciences in 1989. Dr. Siddique holds California license A62744.
- NPI
- 1497890610NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3577634369
- NPI enumeration date
- February 21, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (530) 332-7300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nayyar Siddique practices at Enloe Health in Chico, California
Dr. Siddique's primary practice is Enloe Health, at 1531 Esplanade, Chico, CA 95926 in Butte County. The practice phone is (530) 332-7300.
- Enloe Health1531 Esplanade, Chico, CA 95926 · Butte CountyPhone(530) 332-7300
Source: Dmand AI Affiliation Data
Dr. Nayyar Siddique is affiliated with 7 sites of care and 4 medical groups
Dr. Siddique's primary practice is Enloe Health in Chico, California, part of Enloe Health. Dr. Siddique is also affiliated with Benefis East Campus. The medical group on file is Enloe Specialty Physicians. Dmand AI also links Dr. Siddique to 3 more hospitals, 3 medical groups and 2 group practices and clinics, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Nayyar Siddique's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Siddique practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Enloe Health | Available with a free account |
| +6 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Enloe Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Nayyar Siddique is one of 1,502 hematologists and oncologists in California
Hematology and oncology is Dr. Siddique's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Siddique is board certified in medical oncology by the American Board of Internal Medicine. Dmand AI has Dr. Siddique's licenses on file in 6 states: California, Montana, Minnesota, North Dakota, Michigan and Texas.
Specialties and state licenses
- Hematology and oncology, CaliforniaPrimary
- Montana license
- Minnesota license
- Medical oncology, North Dakota
- Michigan license
- Texas license
Clinical focus
Dmand AI lists breast cancer, chronic anemia, chronic embolism thrombosis, chronic leukemia, colorectal cancer, deep vein thrombosis (DVT), immune deficiency disease and lung cancer among the conditions Dr. Siddique treats.
Hematologists and oncologists near Dr. Siddique
Counts of hematologists and oncologists 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. Nayyar Siddique billed Medicare for 1,856 services in 2024
CMS data shows 1,856 Medicare services from Dr. Siddique across 9 procedure codes in 2024, for 194 Medicare patients. Medicare paid $21,912 for them.
Dr. Siddique's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 8,7202024: 1,34085%
- Lab and pathology
- 2023: 1,2952024: 17387%
- Office and hospital visits
- 2023: 7252024: 15479%
- Surgery
- 2023: 8902024: 12087%
- Tests and treatments
- 2023: 4262024: 6984%
- Drugs given in the office
- 2023: 9,3202024: 0100%
Where Dr. Siddique's Medicare services took place, 2024
- In an office1,79697%
- In a facility603%
Dr. Siddique compared with the California median for hematologists and oncologists, 2024
- Dr. Siddique
- California median
- Medicare services
- 1,856vs 93299% above
- Medicare patients
- 194vs 22514% below
- Part D claims
- 372vs 3946% below
Medians across 1,367 hematologists and oncologists in California with Dmand AI profiles that report each measure.
Dr. Siddique'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 Dr. Siddique and other hematologists and oncologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nayyar Siddique treated 194 Medicare patients in 2024, average age 77
CMS counts 194 Medicare patients who saw Dr. Siddique in 2024. The largest group is 75 to 84, with 84 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 2.27, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Siddique's median patient age at 75, with 47% women.
Dr. Siddique's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Siddique's Medicare patients by sex, 2024
- Women10353%
- Men9147%
Chronic conditions among Dr. Siddique's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Cancer49%
- Arthritis44%
- Chronic kidney disease42%
- Ischemic heart disease36%
- Atrial fibrillation31%
- Mood disorders29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Siddique's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women47%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Nayyar Siddique wrote 620 Medicare Part D claims in 2024
In 2024, Dr. Siddique wrote 620 Medicare Part D claims for 170 patients. 73% of them were for generic drugs. CMS names the drug for 372 of them, across 16 drugs with 11 or more claims each, at $547,115 in total drug cost. In 2023, CMS named 701 claims across 20 drugs.
Dr. Siddique's Part D claims by kind of drug, 2024
- Generic452 claims73%
- Brand-name168 claims27%
Dr. Siddique'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. Siddique's Part D claims, 2024
- Opioids4%27 of 620 claims
- Antibiotics4%23 of 620 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: 7012024: 37247%
Drugs named by CMS: 16 in 2024, 20 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. Nayyar Siddique takes part in Medicare
Dr. Siddique 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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Dr. Nayyar Siddique received $28,599 in industry payments from 2016 to 2025
CMS Open Payments shows 515 general payments to Dr. Siddique from 68 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 40% of the total. Novartis Pharmaceuticals Corporation paid the most, $5,330.
General payments to Dr. Siddique by program year, 2016 to 2025
General payments to Dr. Siddique by kind, 2016 to 2025
- Consulting fees$11,30540%
- Food and beverage$10,11936%
- Gifts$2,4889%
- Device or supply loans$2,1658%
- Other$1,8457%
Companies that paid Dr. Siddique 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. Nayyar Siddique graduated from Dow University of Health Sciences
Dr. Siddique graduated from Dow University of Health Sciences in 1989.
- Medical school
- Board certified in medical oncology
Source: Dmand AI Professional Profile Data
Dr. Nayyar Siddique accepts plans from 11 insurance carriers
Dr. Siddique is in network with 11 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. HMO plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Medica
- Blue Cross Blue Shield of Massachusetts
- Elevance
- HCSC
- Molina
- +3 more carriersWith a free account
Plan types Dr. Siddique accepts, by number of carriers
- HMO7
- Medicare7
- PPO7
- POS4
- EPO2
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Nayyar Siddique'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 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) |
| 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. Nayyar Siddique
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. Nayyar Siddique's NPI number?
Dr. Nayyar Siddique's NPI number is 1497890610. It was assigned on February 21, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Nayyar Siddique?
Dr. Nayyar Siddique is a hematologist and oncologist in Chico, California. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Nayyar Siddique practice?
Dr. Siddique practices at 1531 Esplanade, Chico, CA 95926. Dr. Siddique's primary practice is Enloe Health in Chico, California, part of Enloe Health. Dmand AI also links Dr. Siddique to 3 hospitals, 3 medical groups and 2 group practices and clinics.
What is Dr. Nayyar Siddique's office phone number?
The practice phone on file for Dr. Siddique is (530) 332-7300.
What is Dr. Nayyar Siddique's medical license number?
Dr. Siddique holds California license A62744, one of the licenses on file in 6 states.
Which states has Dr. Nayyar Siddique been licensed in?
Dmand AI has state licenses on file for Dr. Siddique in California (1997 to 2026), Montana (2023 to 2027), Minnesota (2023 to 2025), North Dakota (2024 to 2025), Michigan (1994 to 1998) and Texas (1995 to 1997).
Which hospitals is Dr. Nayyar Siddique affiliated with?
Dr. Siddique practices at Enloe Health in Chico, California. Dr. Siddique is also affiliated with Benefis East Campus. Dmand AI links Dr. Siddique to 3 more hospitals.
What medical group is Dr. Nayyar Siddique part of?
Dr. Siddique is linked to Enloe Specialty Physicians. Dmand AI links Dr. Siddique to 3 more medical groups.
Does Dr. Nayyar Siddique accept Medicare?
Yes. CMS data shows Dr. Siddique billed Medicare for 1,856 services in 2024, and Dr. Siddique accepts Medicare assignment.
How many Medicare patients does Dr. Nayyar Siddique see?
CMS counts 194 Medicare patients who saw Dr. Siddique in 2024, with an average age of 77.
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Is Dr. Nayyar Siddique board certified?
Yes. Dr. Siddique is board certified in medical oncology by the American Board of Internal Medicine.
What services does Dr. Nayyar Siddique bill to Medicare?
In 2024, Dr. Siddique's most billed Medicare services were medicare temporary code (Q5106), lab and pathology test (85025) and surgery: heart and blood vessels (36415).
Where did Dr. Nayyar Siddique go to medical school?
Dr. Siddique graduated from Dow University of Health Sciences in 1989.
What drugs does Dr. Nayyar Siddique prescribe most?
In 2024 Medicare Part D data, Dr. Siddique's most prescribed drugs by claims were Letrozole, Eliquis and Gabapentin.
Has Dr. Nayyar Siddique received payments from drug or device companies?
CMS Open Payments shows $28,599 in general payments to Dr. Siddique from 68 companies from 2016 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. Nayyar Siddique been practicing?
Dr. Siddique graduated from medical school in 1989, 37 years ago.
What insurance does Dr. Nayyar Siddique accept?
Dr. Siddique is in network with 11 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. HMO plans come from the most carriers, 7. Check the plan with the practice before a visit.
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