astronomy

Usman Yusuf

Usman Yusuf is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Usman Yusuf rather than just read about it. In short: Usman Yusuf is a Nigerian professor of haematology-oncology and bone marrow transplantation and an alumnus of Ahmadu Bello University and has practiced medicine across three continents – Africa, Europe and North America – after his MBBS in 1982. He was appointed the executive secretary / chief executive officer of the National Health Insurance Scheme (NHIS) in August 2016 by President Muhammadu Buhari.

Key takeaways

Usman Yusuf belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Usman Yusuf to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Usman Yusuf from memory before moving on to harder problems.

Reference excerpt

Usman Yusuf is a Nigerian professor of haematology-oncology and bone marrow transplantation and an alumnus of Ahmadu Bello University and has practiced medicine across three continents – Africa, Europe and North America – after his MBBS in 1982. He was appointed the executive secretary / chief executive officer of the National Health Insurance Scheme (NHIS) in August 2016 by President Muhammadu Buhari.

Career Usman Yusuf graduated from Ahmadu Bello University in 1982, where he obtained an MBBS and has practiced medicine across three continents – Africa, Europe and North America – ever since. He became a consultant paediatrician and Fellow of the West African College of Physicians in 1989 and won a scholarship for a postgraduate diploma in Tropical Medicine and Hygiene at the University of Liverpool (UK) in 1988. He moved to Fred Hutchinson Cancer Research Center in Seattle, Washington, US, as transplant fellow and assistant professor in 2000 and in 2003, he moved to St. Jude Children's Research Hospital in Memphis, Tennessee, as assistant professor in the Division of Stem Cell Transplantation and rose to the rank of full professor in 2008.

Corruption & irregularities at the NHIS Ever since he became the NHIS boss, he has been faced with numerous suspensions, of which he rejected some, on the account that he can only be suspended by the Federal Government of Nigeria. He was earlier suspended by the Nigerian Health Minister in 2017 and by the Board of NHIS in October 2018. Usman in a video done in 2017 lamented that if NHIS was a business they should have declared bankruptcy and that the NHIS has covered only one per cent of Nigerians for 12 years. He is presently under investigations by the Nigerian House of Assembly after a motion was brought under matters of urgent national importance by Diri Douye on 23 October 2018. He is currently on an administrative leave till 2019 as directed by the Federal Government of Nigeria. The directive was conveyed in a letter signed by the office of the Secretary to the Government of the Federation, Boss Mustapha while in his absence, Mr. Ben Omogo, a director of administration in the Office of the Head of the Civil Service of the Federation has been deployed to oversee the affairs of the scheme. Prof. Yusuf was removed as NHIS executive secretary and replaced with Prof. Mohammed Sambo. It was later revealed by the Office of the Auditor-General (Nigeria) that Professor Usman Yusuf engaged in payment of N6.8bn (circa $18.5m) fraudulently to himself and staff as unauthorized and unrecognised costs and allowances (including "Pre-retirement overseas training allowance"). There are no evidence (via receipts and bookings) that some of the costs were incurred. In 2025, he was arrested based on suspicions of financial misconduct during his tenure as the Director-General of the National Health Insurance Scheme (NHIS).

References

Worked examples

Example 1 — a first encounter with Usman Yusuf

Start with the simplest possible case. Write down what Usman Yusuf claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Usman Yusuf before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Usman Yusuf ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Usman Yusuf

In research: Usman Yusuf appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Usman Yusuf in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Usman Yusuf is common in secondary-school and first-year university syllabi. It links to neighbouring topics Ahmadu Bello University alumni, Alumni of the University of Liverpool, Living people, so understanding it makes those chapters shorter.
In everyday life: Look for Usman Yusuf outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Usman Yusuf in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Usman Yusuf means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Usman Yusuf out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Usman Yusuf in simple terms?

Why does Usman Yusuf matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Usman Yusuf?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Usman Yusuf.